85390511 has 2 divisors, whose sum is σ = 85390512. Its totient is φ = 85390510.

The previous prime is 85390499. The next prime is 85390519. The reversal of 85390511 is 11509358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85390511 - 2⁶ = 85390447 is a prime.

It is a super-2 number, since 2×85390511² = 14583078737682242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85390519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42695255 + 42695256.

It is an arithmetic number, because the mean of its divisors is an integer number (42695256).

Almost surely, 2^85390511 is an apocalyptic number.

85390511 is a deficient number, since it is larger than the sum of its proper divisors (1).

85390511 is an equidigital number, since it uses as much as digits as its factorization.

85390511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 85390511 is about 9240.6986207754. The cubic root of 85390511 is about 440.3552760732.

Adding to 85390511 its reverse (11509358), we get a palindrome (96899869).

The spelling of 85390511 in words is "eighty-five million, three hundred ninety thousand, five hundred eleven".