85831507 has 2 divisors, whose sum is σ = 85831508. Its totient is φ = 85831506.

The previous prime is 85831481. The next prime is 85831519. The reversal of 85831507 is 70513858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85831507 - 2¹¹ = 85829459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85831307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42915753 + 42915754.

It is an arithmetic number, because the mean of its divisors is an integer number (42915754).

Almost surely, 2^85831507 is an apocalyptic number.

85831507 is a deficient number, since it is larger than the sum of its proper divisors (1).

85831507 is an equidigital number, since it uses as much as digits as its factorization.

85831507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 85831507 is about 9264.5295077516. The cubic root of 85831507 is about 441.1120407491.

The spelling of 85831507 in words is "eighty-five million, eight hundred thirty-one thousand, five hundred seven".