85038931 has 2 divisors, whose sum is σ = 85038932. Its totient is φ = 85038930.

The previous prime is 85038929. The next prime is 85038971. The reversal of 85038931 is 13983058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85038931 - 2¹ = 85038929 is a prime.

It is a super-2 number, since 2×85038931² = 14463239571245522, which contains 22 as substring.

Together with 85038929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85038911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42519465 + 42519466.

It is an arithmetic number, because the mean of its divisors is an integer number (42519466).

Almost surely, 2^85038931 is an apocalyptic number.

85038931 is a deficient number, since it is larger than the sum of its proper divisors (1).

85038931 is an equidigital number, since it uses as much as digits as its factorization.

85038931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 85038931 is about 9221.6555455081. The cubic root of 85038931 is about 439.7500836274.

The spelling of 85038931 in words is "eighty-five million, thirty-eight thousand, nine hundred thirty-one".