99990237 has 16 divisors (see below), whose sum is σ = 135569408. Its totient is φ = 65545200.

The previous prime is 99990181. The next prime is 99990239. The reversal of 99990237 is 73209999.

It is a happy number.

It is not a de Polignac number, because 99990237 - 2¹² = 99986141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45588 + ... + 47730.

It is an arithmetic number, because the mean of its divisors is an integer number (8473088).

Almost surely, 2^99990237 is an apocalyptic number.

It is an amenable number.

99990237 is a deficient number, since it is larger than the sum of its proper divisors (35579171).

99990237 is a wasteful number, since it uses less digits than its factorization.

99990237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its (nonzero) digits is 275562, while the sum is 48.

The square root of 99990237 is about 9999.5118380849. The cubic root of 99990237 is about 464.1437775924.

The spelling of 99990237 in words is "ninety-nine million, nine hundred ninety thousand, two hundred thirty-seven".