1961029349 has 4 divisors (see below), whose sum is σ = 2064241440. Its totient is φ = 1857817260.

The previous prime is 1961029337. The next prime is 1961029361. The reversal of 1961029349 is 9439201691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1961029337) and next prime (1961029361).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961029349 is a prime.

It is a super-2 number, since 2×1961029349² = 7691272215278727602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961029249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51606017 + ... + 51606054.

It is an arithmetic number, because the mean of its divisors is an integer number (516060360).

Almost surely, 2^1961029349 is an apocalyptic number.

1961029349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1961029349 is a deficient number, since it is larger than the sum of its proper divisors (103212091).

1961029349 is a wasteful number, since it uses less digits than its factorization.

1961029349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103212090.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1961029349 is about 44283.5110283726. The cubic root of 1961029349 is about 1251.6839914395.

The spelling of 1961029349 in words is "one billion, nine hundred sixty-one million, twenty-nine thousand, three hundred forty-nine".