99699631 has 4 divisors (see below), whose sum is σ = 104947000. Its totient is φ = 94452264.

The previous prime is 99699623. The next prime is 99699637. The reversal of 99699631 is 13699699.

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 99699631 - 2³ = 99699623 is a prime.

It is a super-2 number, since 2×99699631² = 19880032843072322, 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 (99699637) 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 3 ways as a sum of consecutive naturals, for example, 2623656 + ... + 2623693.

It is an arithmetic number, because the mean of its divisors is an integer number (26236750).

Almost surely, 2^99699631 is an apocalyptic number.

99699631 is a deficient number, since it is larger than the sum of its proper divisors (5247369).

99699631 is a wasteful number, since it uses less digits than its factorization.

99699631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247368.

The product of its digits is 708588, while the sum is 52.

The square root of 99699631 is about 9984.9702553388. The cubic root of 99699631 is about 463.6936874831.

It can be divided in two parts, 9969 and 9631, that added together give a square (19600 = 140²).

The spelling of 99699631 in words is "ninety-nine million, six hundred ninety-nine thousand, six hundred thirty-one".