85331979 has 6 divisors (see below), whose sum is σ = 123257316. Its totient is φ = 56887980.

The previous prime is 85331977. The next prime is 85331999. The reversal of 85331979 is 97913358.

It is a happy number.

It is not a de Polignac number, because 85331979 - 2¹ = 85331977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85331977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4740657 + ... + 4740674.

It is an arithmetic number, because the mean of its divisors is an integer number (20542886).

Almost surely, 2^85331979 is an apocalyptic number.

85331979 is a deficient number, since it is larger than the sum of its proper divisors (37925337).

85331979 is a wasteful number, since it uses less digits than its factorization.

85331979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481337 (or 9481334 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 85331979 is about 9237.5310013012. The cubic root of 85331979 is about 440.2546373871.

The spelling of 85331979 in words is "eighty-five million, three hundred thirty-one thousand, nine hundred seventy-nine".