31677361979 has 4 divisors (see below), whose sum is σ = 31693974984. Its totient is φ = 31660748976.

The previous prime is 31677361973. The next prime is 31677361987. The reversal of 31677361979 is 97916377613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97916377613 = 7253 ⋅13500121.

It is a cyclic number.

It is not a de Polignac number, because 31677361979 - 2¹² = 31677357883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31677361973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8303642 + ... + 8307455.

It is an arithmetic number, because the mean of its divisors is an integer number (7923493746).

Almost surely, 2^31677361979 is an apocalyptic number.

31677361979 is a deficient number, since it is larger than the sum of its proper divisors (16613005).

31677361979 is a wasteful number, since it uses less digits than its factorization.

31677361979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16613004.

The product of its digits is 9001692, while the sum is 59.

The spelling of 31677361979 in words is "thirty-one billion, six hundred seventy-seven million, three hundred sixty-one thousand, nine hundred seventy-nine".