85244039 has 2 divisors, whose sum is σ = 85244040. Its totient is φ = 85244038.

The previous prime is 85244009. The next prime is 85244053. The reversal of 85244039 is 93044258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85244039 - 2⁸ = 85243783 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85244009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42622019 + 42622020.

It is an arithmetic number, because the mean of its divisors is an integer number (42622020).

Almost surely, 2^85244039 is an apocalyptic number.

85244039 is a deficient number, since it is larger than the sum of its proper divisors (1).

85244039 is an equidigital number, since it uses as much as digits as its factorization.

85244039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 85244039 is about 9232.7698444183. The cubic root of 85244039 is about 440.1033486571.

The spelling of 85244039 in words is "eighty-five million, two hundred forty-four thousand, thirty-nine".