85972759139 has 2 divisors, whose sum is σ = 85972759140. Its totient is φ = 85972759138.

The previous prime is 85972759109. The next prime is 85972759151. The reversal of 85972759139 is 93195727958.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85972759139 is a prime.

It is not a weakly prime, because it can be changed into another prime (85972759109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42986379569 + 42986379570.

It is an arithmetic number, because the mean of its divisors is an integer number (42986379570).

Almost surely, 2^85972759139 is an apocalyptic number.

85972759139 is a deficient number, since it is larger than the sum of its proper divisors (1).

85972759139 is an equidigital number, since it uses as much as digits as its factorization.

85972759139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 65.

The spelling of 85972759139 in words is "eighty-five billion, nine hundred seventy-two million, seven hundred fifty-nine thousand, one hundred thirty-nine".