99612761 has 4 divisors (see below), whose sum is σ = 99725952. Its totient is φ = 99499572.

The previous prime is 99612743. The next prime is 99612781. The reversal of 99612761 is 16721699.

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: 16721699 = 421 ⋅39719.

It is a cyclic number.

It is not a de Polignac number, because 99612761 - 2²⁶ = 32503897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99612731) 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, 55265 + ... + 57038.

It is an arithmetic number, because the mean of its divisors is an integer number (24931488).

Almost surely, 2^99612761 is an apocalyptic number.

It is an amenable number.

99612761 is a deficient number, since it is larger than the sum of its proper divisors (113191).

99612761 is a wasteful number, since it uses less digits than its factorization.

99612761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113190.

The product of its digits is 40824, while the sum is 41.

The square root of 99612761 is about 9980.6192693640. The cubic root of 99612761 is about 463.5589735926.

The spelling of 99612761 in words is "ninety-nine million, six hundred twelve thousand, seven hundred sixty-one".