1961079531 has 4 divisors (see below), whose sum is σ = 2614772712. Its totient is φ = 1307386352.

The previous prime is 1961079413. The next prime is 1961079581. The reversal of 1961079531 is 1359701691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1961079531 - 2⁷ = 1961079403 is a prime.

It is a super-2 number, since 2×1961079531² = 7691665853814359922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1961079581) 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, 326846586 + ... + 326846591.

It is an arithmetic number, because the mean of its divisors is an integer number (653693178).

Almost surely, 2^1961079531 is an apocalyptic number.

1961079531 is a deficient number, since it is larger than the sum of its proper divisors (653693181).

1961079531 is an equidigital number, since it uses as much as digits as its factorization.

1961079531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653693180.

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 1961079531 is about 44284.0776239045. The cubic root of 1961079531 is about 1251.6946680552.

The spelling of 1961079531 in words is "one billion, nine hundred sixty-one million, seventy-nine thousand, five hundred thirty-one".