891064157 has 2 divisors, whose sum is σ = 891064158. Its totient is φ = 891064156.

The previous prime is 891064127. The next prime is 891064171. The reversal of 891064157 is 751460198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 714546361 + 176517796 = 26731^2 + 13286^2 .

It is a cyclic number.

It is not a de Polignac number, because 891064157 - 2²⁸ = 622628701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (891064127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445532078 + 445532079.

It is an arithmetic number, because the mean of its divisors is an integer number (445532079).

Almost surely, 2^891064157 is an apocalyptic number.

It is an amenable number.

891064157 is a deficient number, since it is larger than the sum of its proper divisors (1).

891064157 is an equidigital number, since it uses as much as digits as its factorization.

891064157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 891064157 is about 29850.6977640390. The cubic root of 891064157 is about 962.2833944916.

The spelling of 891064157 in words is "eight hundred ninety-one million, sixty-four thousand, one hundred fifty-seven".