99689913 has 16 divisors (see below), whose sum is σ = 148512000. Its totient is φ = 66089520.

The previous prime is 99689899. The next prime is 99689917. The reversal of 99689913 is 31998699.

It is not a de Polignac number, because 99689913 - 2⁴ = 99689897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99689913.

It is not an unprimeable number, because it can be changed into a prime (99689917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5313 + ... + 15086.

It is an arithmetic number, because the mean of its divisors is an integer number (9282000).

Almost surely, 2^99689913 is an apocalyptic number.

It is an amenable number.

99689913 is a deficient number, since it is larger than the sum of its proper divisors (48822087).

99689913 is a wasteful number, since it uses less digits than its factorization.

99689913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20589 (or 20583 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 99689913 is about 9984.4836120853. The cubic root of 99689913 is about 463.6786211562.

It can be divided in two parts, 9968 and 9913, that added together give a square (19881 = 141²).

The spelling of 99689913 in words is "ninety-nine million, six hundred eighty-nine thousand, nine hundred thirteen".