957320891 has 2 divisors, whose sum is σ = 957320892. Its totient is φ = 957320890.

The previous prime is 957320879. The next prime is 957320929. The reversal of 957320891 is 198023759.

It is a weak prime.

It is an emirp because it is prime and its reverse (198023759) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-957320891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (957320851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478660445 + 478660446.

It is an arithmetic number, because the mean of its divisors is an integer number (478660446).

Almost surely, 2^957320891 is an apocalyptic number.

957320891 is a deficient number, since it is larger than the sum of its proper divisors (1).

957320891 is an equidigital number, since it uses as much as digits as its factorization.

957320891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 957320891 is about 30940.6026282618. The cubic root of 957320891 is about 985.5663009987.

The spelling of 957320891 in words is "nine hundred fifty-seven million, three hundred twenty thousand, eight hundred ninety-one".