890811157 has 2 divisors, whose sum is σ = 890811158. Its totient is φ = 890811156.

The previous prime is 890811151. The next prime is 890811191. The reversal of 890811157 is 751118098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 653620356 + 237190801 = 25566^2 + 15401^2 .

It is a cyclic number.

It is not a de Polignac number, because 890811157 - 2¹¹ = 890809109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (890811151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445405578 + 445405579.

It is an arithmetic number, because the mean of its divisors is an integer number (445405579).

Almost surely, 2^890811157 is an apocalyptic number.

It is an amenable number.

890811157 is a deficient number, since it is larger than the sum of its proper divisors (1).

890811157 is an equidigital number, since it uses as much as digits as its factorization.

890811157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 890811157 is about 29846.4597063035. The cubic root of 890811157 is about 962.1923121072.

The spelling of 890811157 in words is "eight hundred ninety million, eight hundred eleven thousand, one hundred fifty-seven".