890567257 has 2 divisors, whose sum is σ = 890567258. Its totient is φ = 890567256.

The previous prime is 890567239. The next prime is 890567261. The reversal of 890567257 is 752765098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606341376 + 284225881 = 24624^2 + 16859^2 .

It is a cyclic number.

It is not a de Polignac number, because 890567257 - 2¹¹ = 890565209 is a prime.

It is a super-2 number, since 2×890567257² = 1586220078481008098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 890567257.

It is not a weakly prime, because it can be changed into another prime (890567207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445283628 + 445283629.

It is an arithmetic number, because the mean of its divisors is an integer number (445283629).

Almost surely, 2^890567257 is an apocalyptic number.

It is an amenable number.

890567257 is a deficient number, since it is larger than the sum of its proper divisors (1).

890567257 is an equidigital number, since it uses as much as digits as its factorization.

890567257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 890567257 is about 29842.3735148530. The cubic root of 890567257 is about 962.1044894809.

The spelling of 890567257 in words is "eight hundred ninety million, five hundred sixty-seven thousand, two hundred fifty-seven".