961249731 has 16 divisors (see below), whose sum is σ = 1383826080. Its totient is φ = 590008320.

The previous prime is 961249699. The next prime is 961249733. The reversal of 961249731 is 137942169.

It is not a de Polignac number, because 961249731 - 2⁵ = 961249699 is a prime.

It is a super-2 number, since 2×961249731² = 1848002090695144722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (961249733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16510 + ... + 46851.

It is an arithmetic number, because the mean of its divisors is an integer number (86489130).

Almost surely, 2^961249731 is an apocalyptic number.

961249731 is a deficient number, since it is larger than the sum of its proper divisors (422576349).

961249731 is a wasteful number, since it uses less digits than its factorization.

961249731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63766.

The product of its digits is 81648, while the sum is 42.

The square root of 961249731 is about 31004.0276577092. The cubic root of 961249731 is about 986.9127137903.

The spelling of 961249731 in words is "nine hundred sixty-one million, two hundred forty-nine thousand, seven hundred thirty-one".