99477631 has 4 divisors (see below), whose sum is σ = 108521064. Its totient is φ = 90434200.

The previous prime is 99477617. The next prime is 99477643. The reversal of 99477631 is 13677499.

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 99477631 - 2²³ = 91089023 is a prime.

It is a super-2 number, since 2×99477631² = 19791598138744322, which 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 (99475631) 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, 4521700 + ... + 4521721.

It is an arithmetic number, because the mean of its divisors is an integer number (27130266).

Almost surely, 2^99477631 is an apocalyptic number.

99477631 is a deficient number, since it is larger than the sum of its proper divisors (9043433).

99477631 is a wasteful number, since it uses less digits than its factorization.

99477631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9043432.

The product of its digits is 285768, while the sum is 46.

The square root of 99477631 is about 9973.8473519500. The cubic root of 99477631 is about 463.3492646156.

It can be divided in two parts, 9947 and 7631, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 99477631 in words is "ninety-nine million, four hundred seventy-seven thousand, six hundred thirty-one".