956946991 has 16 divisors (see below), whose sum is σ = 1284853248. Its totient is φ = 688312800.

The previous prime is 956946971. The next prime is 956947007. The reversal of 956946991 is 199649659.

It is not a de Polignac number, because 956946991 - 2⁹ = 956946479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (956946961) 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, 476995 + ... + 478996.

It is an arithmetic number, because the mean of its divisors is an integer number (80303328).

Almost surely, 2^956946991 is an apocalyptic number.

956946991 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

956946991 is a deficient number, since it is larger than the sum of its proper divisors (327906257).

956946991 is a wasteful number, since it uses less digits than its factorization.

956946991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956022.

The product of its digits is 4723920, while the sum is 58.

The square root of 956946991 is about 30934.5598158435. The cubic root of 956946991 is about 985.4379736951.

The spelling of 956946991 in words is "nine hundred fifty-six million, nine hundred forty-six thousand, nine hundred ninety-one".