99564901 has 4 divisors (see below), whose sum is σ = 102776704. Its totient is φ = 96353100.

The previous prime is 99564841. The next prime is 99564931. The reversal of 99564901 is 10946599.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99564901 is a prime.

It is a super-2 number, since 2×99564901² = 19826339022279602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99564931) 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, 1605855 + ... + 1605916.

It is an arithmetic number, because the mean of its divisors is an integer number (25694176).

Almost surely, 2^99564901 is an apocalyptic number.

It is an amenable number.

99564901 is a deficient number, since it is larger than the sum of its proper divisors (3211803).

99564901 is a wasteful number, since it uses less digits than its factorization.

99564901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211802.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 99564901 is about 9978.2213344864. The cubic root of 99564901 is about 463.4847211028.

The spelling of 99564901 in words is "ninety-nine million, five hundred sixty-four thousand, nine hundred one".