99993656 has 32 divisors (see below), whose sum is σ = 225552000. Its totient is φ = 40598496.

The previous prime is 99993611. The next prime is 99993671. The reversal of 99993656 is 65639999.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45926 + ... + 48053.

It is an arithmetic number, because the mean of its divisors is an integer number (7048500).

Almost surely, 2^99993656 is an apocalyptic number.

It is an amenable number.

99993656 is an abundant number, since it is smaller than the sum of its proper divisors (125558344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99993656 is a wasteful number, since it uses less digits than its factorization.

99993656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94011 (or 94007 counting only the distinct ones).

The product of its digits is 3542940, while the sum is 56.

The square root of 99993656 is about 9999.6827949690. The cubic root of 99993656 is about 464.1490677405.

The spelling of 99993656 in words is "ninety-nine million, nine hundred ninety-three thousand, six hundred fifty-six".