99988749 has 20 divisors (see below), whose sum is σ = 170704864. Its totient is φ = 57136104.

The previous prime is 99988649. The next prime is 99988753. The reversal of 99988749 is 94788999.

It is not a de Polignac number, because 99988749 - 2²³ = 91600141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99988349) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87607 + ... + 88740.

Almost surely, 2^99988749 is an apocalyptic number.

It is an amenable number.

99988749 is a deficient number, since it is larger than the sum of its proper divisors (70716115).

99988749 is a wasteful number, since it uses less digits than its factorization.

99988749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176366 (or 176357 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 99988749 is about 9999.4374341760. The cubic root of 99988749 is about 464.1414752031.

The spelling of 99988749 in words is "ninety-nine million, nine hundred eighty-eight thousand, seven hundred forty-nine".