811457137 has 2 divisors, whose sum is σ = 811457138. Its totient is φ = 811457136.

The previous prime is 811457093. The next prime is 811457161. The reversal of 811457137 is 731754118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 806787216 + 4669921 = 28404^2 + 2161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811457137 is a prime.

It is a Chen prime.

It is equal to p_41705299 and since 811457137 and 41705299 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 811457096 and 811457105.

It is not a weakly prime, because it can be changed into another prime (811457177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405728568 + 405728569.

It is an arithmetic number, because the mean of its divisors is an integer number (405728569).

Almost surely, 2^811457137 is an apocalyptic number.

It is an amenable number.

811457137 is a deficient number, since it is larger than the sum of its proper divisors (1).

811457137 is an equidigital number, since it uses as much as digits as its factorization.

811457137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 37.

The square root of 811457137 is about 28486.0867266812. The cubic root of 811457137 is about 932.7283877333.

The spelling of 811457137 in words is "eight hundred eleven million, four hundred fifty-seven thousand, one hundred thirty-seven".