99979237 has 4 divisors (see below), whose sum is σ = 100001056. Its totient is φ = 99957420.

The previous prime is 99979223. The next prime is 99979249. The reversal of 99979237 is 73297999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99979237 - 2⁷ = 99979109 is a prime.

It is a super-2 number, since 2×99979237² = 19991695662204338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99979337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1089 + ... + 14182.

It is an arithmetic number, because the mean of its divisors is an integer number (25000264).

Almost surely, 2^99979237 is an apocalyptic number.

It is an amenable number.

99979237 is a deficient number, since it is larger than the sum of its proper divisors (21819).

99979237 is a wasteful number, since it uses less digits than its factorization.

99979237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21818.

The product of its digits is 1928934, while the sum is 55.

The square root of 99979237 is about 9998.9617961066. The cubic root of 99979237 is about 464.1267567014.

The spelling of 99979237 in words is "ninety-nine million, nine hundred seventy-nine thousand, two hundred thirty-seven".