99564949 has 4 divisors (see below), whose sum is σ = 108616320. Its totient is φ = 90513580.

The previous prime is 99564947. The next prime is 99564973. The reversal of 99564949 is 94946599.

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 not a de Polignac number, because 99564949 - 2¹ = 99564947 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 99564949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99564943) 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, 4525669 + ... + 4525690.

It is an arithmetic number, because the mean of its divisors is an integer number (27154080).

Almost surely, 2^99564949 is an apocalyptic number.

It is an amenable number.

99564949 is a deficient number, since it is larger than the sum of its proper divisors (9051371).

99564949 is a wasteful number, since it uses less digits than its factorization.

99564949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9051370.

The product of its digits is 3149280, while the sum is 55.

The square root of 99564949 is about 9978.2237397244. The cubic root of 99564949 is about 463.4847955844.

The spelling of 99564949 in words is "ninety-nine million, five hundred sixty-four thousand, nine hundred forty-nine".