83388387631 has 4 divisors (see below), whose sum is σ = 83624615712. Its totient is φ = 83152159552.

The previous prime is 83388387619. The next prime is 83388387637. The reversal of 83388387631 is 13678388338.

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 83388387631 - 2⁹ = 83388387119 is a prime.

It is a super-2 number, since 2×83388387631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83388387637) 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, 118113511 + ... + 118114216.

It is an arithmetic number, because the mean of its divisors is an integer number (20906153928).

Almost surely, 2^83388387631 is an apocalyptic number.

83388387631 is a deficient number, since it is larger than the sum of its proper divisors (236228081).

83388387631 is a wasteful number, since it uses less digits than its factorization.

83388387631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236228080.

The product of its digits is 13934592, while the sum is 58.

The spelling of 83388387631 in words is "eighty-three billion, three hundred eighty-eight million, three hundred eighty-seven thousand, six hundred thirty-one".