99942621 has 16 divisors (see below), whose sum is σ = 138236736. Its totient is φ = 64181376.

The previous prime is 99942611. The next prime is 99942629. The reversal of 99942621 is 12624999.

It is not a de Polignac number, because 99942621 - 2¹¹ = 99940573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99942629) 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, 4111 + ... + 14723.

It is an arithmetic number, because the mean of its divisors is an integer number (8639796).

Almost surely, 2^99942621 is an apocalyptic number.

It is an amenable number.

99942621 is a deficient number, since it is larger than the sum of its proper divisors (38294115).

99942621 is a wasteful number, since it uses less digits than its factorization.

99942621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10732.

The product of its digits is 69984, while the sum is 42.

The square root of 99942621 is about 9997.1306383382. The cubic root of 99942621 is about 464.0700898009.

The spelling of 99942621 in words is "ninety-nine million, nine hundred forty-two thousand, six hundred twenty-one".