99020001 has 16 divisors (see below), whose sum is σ = 139711040. Its totient is φ = 62208000.

The previous prime is 99019993. The next prime is 99020003. The reversal of 99020001 is 10002099.

It is a happy number.

It is not a de Polignac number, because 99020001 - 2³ = 99019993 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 99020001.

It is not an unprimeable number, because it can be changed into a prime (99020003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6501 + ... + 15501.

It is an arithmetic number, because the mean of its divisors is an integer number (8731940).

Almost surely, 2^99020001 is an apocalyptic number.

It is an amenable number.

99020001 is a deficient number, since it is larger than the sum of its proper divisors (40691039).

99020001 is a wasteful number, since it uses less digits than its factorization.

99020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 99020001 is about 9950.8794083739. The cubic root of 99020001 is about 462.6376523310.

The spelling of 99020001 in words is "ninety-nine million, twenty thousand, one".