85136739 has 32 divisors (see below), whose sum is σ = 122918400. Its totient is φ = 52254720.

The previous prime is 85136707. The next prime is 85136743. The reversal of 85136739 is 93763158.

It is not a de Polignac number, because 85136739 - 2⁵ = 85136707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85136739.

It is not an unprimeable number, because it can be changed into a prime (85136239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 441027 + ... + 441219.

It is an arithmetic number, because the mean of its divisors is an integer number (3841200).

Almost surely, 2^85136739 is an apocalyptic number.

85136739 is a deficient number, since it is larger than the sum of its proper divisors (37781661).

85136739 is a wasteful number, since it uses less digits than its factorization.

85136739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its digits is 136080, while the sum is 42.

The square root of 85136739 is about 9226.9571907536. The cubic root of 85136739 is about 439.9186127014.

The spelling of 85136739 in words is "eighty-five million, one hundred thirty-six thousand, seven hundred thirty-nine".