85838979 has 16 divisors (see below), whose sum is σ = 120942080. Its totient is φ = 54004320.

The previous prime is 85838971. The next prime is 85838983. The reversal of 85838979 is 97983858.

It is not a de Polignac number, because 85838979 - 2³ = 85838971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85838971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12669 + ... + 18225.

It is an arithmetic number, because the mean of its divisors is an integer number (7558880).

Almost surely, 2^85838979 is an apocalyptic number.

85838979 is a deficient number, since it is larger than the sum of its proper divisors (35103101).

85838979 is a wasteful number, since it uses less digits than its factorization.

85838979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850.

The product of its digits is 4354560, while the sum is 57.

The square root of 85838979 is about 9264.9327574462. The cubic root of 85838979 is about 441.1248406080.

The spelling of 85838979 in words is "eighty-five million, eight hundred thirty-eight thousand, nine hundred seventy-nine".