970640891 has 12 divisors (see below), whose sum is σ = 1124835720. Its totient is φ = 830492160.

The previous prime is 970640831. The next prime is 970640939. The reversal of 970640891 is 198046079.

It is not a de Polignac number, because 970640891 - 2¹⁴ = 970624507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (970640831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149486 + ... + 155843.

It is an arithmetic number, because the mean of its divisors is an integer number (93736310).

Almost surely, 2^970640891 is an apocalyptic number.

970640891 is a deficient number, since it is larger than the sum of its proper divisors (154194829).

970640891 is a wasteful number, since it uses less digits than its factorization.

970640891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305374 (or 305357 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 970640891 is about 31155.1101907857. The cubic root of 970640891 is about 990.1162639363.

The spelling of 970640891 in words is "nine hundred seventy million, six hundred forty thousand, eight hundred ninety-one".