99420837 has 8 divisors (see below), whose sum is σ = 132614304. Its totient is φ = 66253968.

The previous prime is 99420833. The next prime is 99420847. The reversal of 99420837 is 73802499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99420837 - 2² = 99420833 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99420833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4983 + ... + 14955.

It is an arithmetic number, because the mean of its divisors is an integer number (16576788).

Almost surely, 2^99420837 is an apocalyptic number.

It is an amenable number.

99420837 is a deficient number, since it is larger than the sum of its proper divisors (33193467).

99420837 is a wasteful number, since it uses less digits than its factorization.

99420837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 99420837 is about 9970.9997994183. Note that the first 3 decimals coincide. The cubic root of 99420837 is about 463.2610690166.

The spelling of 99420837 in words is "ninety-nine million, four hundred twenty thousand, eight hundred thirty-seven".