99420839 has 8 divisors (see below), whose sum is σ = 116041728. Its totient is φ = 83404440.

The previous prime is 99420833. The next prime is 99420847. The reversal of 99420839 is 93802499.

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

It is not a de Polignac number, because 99420839 - 2⁴ = 99420823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99420839.

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, 150767 + ... + 151424.

It is an arithmetic number, because the mean of its divisors is an integer number (14505216).

Almost surely, 2^99420839 is an apocalyptic number.

99420839 is a deficient number, since it is larger than the sum of its proper divisors (16620889).

99420839 is a wasteful number, since it uses less digits than its factorization.

99420839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302245.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 99420839 is about 9970.9998997092. Note that the first 3 decimals coincide. The cubic root of 99420839 is about 463.2610721230.

The spelling of 99420839 in words is "ninety-nine million, four hundred twenty thousand, eight hundred thirty-nine".