99565001 has 4 divisors (see below), whose sum is σ = 99586452. Its totient is φ = 99543552.

The previous prime is 99564979. The next prime is 99565003. The reversal of 99565001 is 10056599.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62647225 + 36917776 = 7915^2 + 6076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99565001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99565003) 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, 536 + ... + 14121.

It is an arithmetic number, because the mean of its divisors is an integer number (24896613).

Almost surely, 2^99565001 is an apocalyptic number.

It is an amenable number.

99565001 is a deficient number, since it is larger than the sum of its proper divisors (21451).

99565001 is a wasteful number, since it uses less digits than its factorization.

99565001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21450.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 99565001 is about 9978.2263453983. The cubic root of 99565001 is about 463.4848762728.

The spelling of 99565001 in words is "ninety-nine million, five hundred sixty-five thousand, one".