956940091 has 4 divisors (see below), whose sum is σ = 957029472. Its totient is φ = 956850712.

The previous prime is 956940067. The next prime is 956940107. The reversal of 956940091 is 190049659.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 190049659 = 3929 ⋅48371.

It is a cyclic number.

It is not a de Polignac number, because 956940091 - 2²⁹ = 420069179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (956940011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26035 + ... + 50908.

It is an arithmetic number, because the mean of its divisors is an integer number (239257368).

Almost surely, 2^956940091 is an apocalyptic number.

956940091 is a deficient number, since it is larger than the sum of its proper divisors (89381).

956940091 is a wasteful number, since it uses less digits than its factorization.

956940091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89380.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 956940091 is about 30934.4482898920. The cubic root of 956940091 is about 985.4356052120.

The spelling of 956940091 in words is "nine hundred fifty-six million, nine hundred forty thousand, ninety-one".