78570131 has 2 divisors, whose sum is σ = 78570132. Its totient is φ = 78570130.

The previous prime is 78570113. The next prime is 78570137. The reversal of 78570131 is 13107587.

Together with previous prime (78570113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78570131 - 2¹⁰ = 78569107 is a prime.

It is a super-2 number, since 2×78570131² = 12346530970714322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_4590833 and since 78570131 and 4590833 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (78570137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285065 + 39285066.

It is an arithmetic number, because the mean of its divisors is an integer number (39285066).

Almost surely, 2^78570131 is an apocalyptic number.

78570131 is a deficient number, since it is larger than the sum of its proper divisors (1).

78570131 is an equidigital number, since it uses as much as digits as its factorization.

78570131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 78570131 is about 8863.9794110772. The cubic root of 78570131 is about 428.3043570595.

The spelling of 78570131 in words is "seventy-eight million, five hundred seventy thousand, one hundred thirty-one".