85672907979 has 4 divisors (see below), whose sum is σ = 114230543976. Its totient is φ = 57115271984.

The previous prime is 85672907977. The next prime is 85672908001. The reversal of 85672907979 is 97970927658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85672907979 - 2¹ = 85672907977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85672907977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14278817994 + ... + 14278817999.

It is an arithmetic number, because the mean of its divisors is an integer number (28557635994).

Almost surely, 2^85672907979 is an apocalyptic number.

85672907979 is a deficient number, since it is larger than the sum of its proper divisors (28557635997).

85672907979 is a wasteful number, since it uses less digits than its factorization.

85672907979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28557635996.

The product of its (nonzero) digits is 120022560, while the sum is 69.

The spelling of 85672907979 in words is "eighty-five billion, six hundred seventy-two million, nine hundred seven thousand, nine hundred seventy-nine".