85102939 has 2 divisors, whose sum is σ = 85102940. Its totient is φ = 85102938.

The previous prime is 85102909. The next prime is 85102951. The reversal of 85102939 is 93920158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85102939 - 2⁹ = 85102427 is a prime.

It is equal to p_4949335 and since 85102939 and 4949335 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 85102898 and 85102907.

It is not a weakly prime, because it can be changed into another prime (85102909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42551469 + 42551470.

It is an arithmetic number, because the mean of its divisors is an integer number (42551470).

Almost surely, 2^85102939 is an apocalyptic number.

85102939 is a deficient number, since it is larger than the sum of its proper divisors (1).

85102939 is an equidigital number, since it uses as much as digits as its factorization.

85102939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 85102939 is about 9225.1254192016. The cubic root of 85102939 is about 439.8603878682.

It can be divided in two parts, 8510 and 2939, that added together give a square (11449 = 107²).

The spelling of 85102939 in words is "eighty-five million, one hundred two thousand, nine hundred thirty-nine".