99019901 has 8 divisors (see below), whose sum is σ = 101119224. Its totient is φ = 96940800.

The previous prime is 99019889. The next prime is 99019909. The reversal of 99019901 is 10991099.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47251876 + 51768025 = 6874^2 + 7195^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 99019901 - 2¹⁰ = 99018877 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 (99019909) 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, 5051 + ... + 14951.

It is an arithmetic number, because the mean of its divisors is an integer number (12639903).

Almost surely, 2^99019901 is an apocalyptic number.

It is an amenable number.

99019901 is a deficient number, since it is larger than the sum of its proper divisors (2099323).

99019901 is a wasteful number, since it uses less digits than its factorization.

99019901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111.

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 99019901 is about 9950.8743836911. The cubic root of 99019901 is about 462.6374965922.

The spelling of 99019901 in words is "ninety-nine million, nineteen thousand, nine hundred one".