870131797 has 2 divisors, whose sum is σ = 870131798. Its totient is φ = 870131796.

The previous prime is 870131719. The next prime is 870131813. The reversal of 870131797 is 797131078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509359761 + 360772036 = 22569^2 + 18994^2 .

It is a cyclic number.

It is not a de Polignac number, because 870131797 - 2²³ = 861743189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870131707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435065898 + 435065899.

It is an arithmetic number, because the mean of its divisors is an integer number (435065899).

Almost surely, 2^870131797 is an apocalyptic number.

It is an amenable number.

870131797 is a deficient number, since it is larger than the sum of its proper divisors (1).

870131797 is an equidigital number, since it uses as much as digits as its factorization.

870131797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 43.

The square root of 870131797 is about 29497.9964912873. The cubic root of 870131797 is about 954.6884749095.

It can be divided in two parts, 87013179 and 7, that multiplied together give a triangular number (609092253 = T₃₄₉₀₂).

The spelling of 870131797 in words is "eight hundred seventy million, one hundred thirty-one thousand, seven hundred ninety-seven".