99564761 has 4 divisors (see below), whose sum is σ = 99792000. Its totient is φ = 99337524.

The previous prime is 99564757. The next prime is 99564797. The reversal of 99564761 is 16746599.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16746599 = 23 ⋅728113.

It is a cyclic number.

It is not a de Polignac number, because 99564761 - 2² = 99564757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99564721) 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, 112961 + ... + 113838.

It is an arithmetic number, because the mean of its divisors is an integer number (24948000).

Almost surely, 2^99564761 is an apocalyptic number.

It is an amenable number.

99564761 is a deficient number, since it is larger than the sum of its proper divisors (227239).

99564761 is a wasteful number, since it uses less digits than its factorization.

99564761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227238.

The product of its digits is 408240, while the sum is 47.

The square root of 99564761 is about 9978.2143192056. The cubic root of 99564761 is about 463.4845038646.

It can be divided in two parts, 995 and 64761, that added together give a palindrome (65756).

The spelling of 99564761 in words is "ninety-nine million, five hundred sixty-four thousand, seven hundred sixty-one".