85767131 has 2 divisors, whose sum is σ = 85767132. Its totient is φ = 85767130.

The previous prime is 85767127. The next prime is 85767163. The reversal of 85767131 is 13176758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85767131 - 2² = 85767127 is a prime.

It is a super-2 number, since 2×85767131² = 14712001519942322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85767931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42883565 + 42883566.

It is an arithmetic number, because the mean of its divisors is an integer number (42883566).

Almost surely, 2^85767131 is an apocalyptic number.

85767131 is a deficient number, since it is larger than the sum of its proper divisors (1).

85767131 is an equidigital number, since it uses as much as digits as its factorization.

85767131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 85767131 is about 9261.0545295879. The cubic root of 85767131 is about 441.0017310963.

The spelling of 85767131 in words is "eighty-five million, seven hundred sixty-seven thousand, one hundred thirty-one".