83631387 has 12 divisors (see below), whose sum is σ = 129714216. Its totient is φ = 47789280.

The previous prime is 83631341. The next prime is 83631391. The reversal of 83631387 is 78313638.

It is not a de Polignac number, because 83631387 - 2¹¹ = 83629339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83621387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284314 + ... + 284607.

It is an arithmetic number, because the mean of its divisors is an integer number (10809518).

Almost surely, 2^83631387 is an apocalyptic number.

83631387 is a deficient number, since it is larger than the sum of its proper divisors (46082829).

83631387 is a wasteful number, since it uses less digits than its factorization.

83631387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568938 (or 568931 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 83631387 is about 9145.0197922148. The cubic root of 83631387 is about 437.3103604771.

It can be divided in two parts, 836 and 31387, that added together give a palindrome (32223).

The spelling of 83631387 in words is "eighty-three million, six hundred thirty-one thousand, three hundred eighty-seven".