85908979619 has 4 divisors (see below), whose sum is σ = 85909689960. Its totient is φ = 85908269280.

The previous prime is 85908979609. The next prime is 85908979633. The reversal of 85908979619 is 91697980958.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85908979619 is a prime.

It is a super-2 number, since 2×85908979619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85908979609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123302 + ... + 432459.

It is an arithmetic number, because the mean of its divisors is an integer number (21477422490).

Almost surely, 2^85908979619 is an apocalyptic number.

85908979619 is a deficient number, since it is larger than the sum of its proper divisors (710341).

85908979619 is a wasteful number, since it uses less digits than its factorization.

85908979619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710340.

The product of its (nonzero) digits is 88179840, while the sum is 71.

The spelling of 85908979619 in words is "eighty-five billion, nine hundred eight million, nine hundred seventy-nine thousand, six hundred nineteen".