31983672477 has 8 divisors (see below), whose sum is σ = 44889364960. Its totient is φ = 20200214160.

The previous prime is 31983672473. The next prime is 31983672503. The reversal of 31983672477 is 77427638913.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31983672477 - 2² = 31983672473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 561117061 = 31983672477 / (3 + 1 + 9 + 8 + 3 + 6 + 7 + 2 + 4 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31983672473) 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 7 ways as a sum of consecutive naturals, for example, 280558474 + ... + 280558587.

It is an arithmetic number, because the mean of its divisors is an integer number (5611170620).

Almost surely, 2^31983672477 is an apocalyptic number.

It is an amenable number.

31983672477 is a deficient number, since it is larger than the sum of its proper divisors (12905692483).

31983672477 is a wasteful number, since it uses less digits than its factorization.

31983672477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561117083.

The product of its digits is 10668672, while the sum is 57.

The spelling of 31983672477 in words is "thirty-one billion, nine hundred eighty-three million, six hundred seventy-two thousand, four hundred seventy-seven".