85003931 has 2 divisors, whose sum is σ = 85003932. Its totient is φ = 85003930.

The previous prime is 85003909. The next prime is 85003949. The reversal of 85003931 is 13930058.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85003931 is a prime.

It is a super-2 number, since 2×85003931² = 14451336570905522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85003894 and 85003903.

It is not a weakly prime, because it can be changed into another prime (85003981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42501965 + 42501966.

It is an arithmetic number, because the mean of its divisors is an integer number (42501966).

Almost surely, 2^85003931 is an apocalyptic number.

85003931 is a deficient number, since it is larger than the sum of its proper divisors (1).

85003931 is an equidigital number, since it uses as much as digits as its factorization.

85003931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 85003931 is about 9219.7576432355. The cubic root of 85003931 is about 439.6897451260.

Adding to 85003931 its reverse (13930058), we get a palindrome (98933989).

The spelling of 85003931 in words is "eighty-five million, three thousand, nine hundred thirty-one".