1961129194 has 8 divisors (see below), whose sum is σ = 3096519840. Its totient is φ = 928955916.

The previous prime is 1961129153. The next prime is 1961129237. The reversal of 1961129194 is 4919211691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1961129194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25804294 + ... + 25804369.

It is an arithmetic number, because the mean of its divisors is an integer number (387064980).

Almost surely, 2^1961129194 is an apocalyptic number.

1961129194 is a deficient number, since it is larger than the sum of its proper divisors (1135390646).

1961129194 is a wasteful number, since it uses less digits than its factorization.

1961129194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51608684.

The product of its digits is 34992, while the sum is 43.

The square root of 1961129194 is about 44284.6383523677. The cubic root of 1961129194 is about 1251.7052340703.

The spelling of 1961129194 in words is "one billion, nine hundred sixty-one million, one hundred twenty-nine thousand, one hundred ninety-four".