89640051 has 4 divisors (see below), whose sum is σ = 119520072. Its totient is φ = 59760032.

The previous prime is 89640017. The next prime is 89640053. The reversal of 89640051 is 15004698.

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

It is a cyclic number.

It is not a de Polignac number, because 89640051 - 2⁷ = 89639923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89639994 and 89640021.

It is not an unprimeable number, because it can be changed into a prime (89640053) 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, 14940006 + ... + 14940011.

It is an arithmetic number, because the mean of its divisors is an integer number (29880018).

Almost surely, 2^89640051 is an apocalyptic number.

89640051 is a deficient number, since it is larger than the sum of its proper divisors (29880021).

89640051 is a wasteful number, since it uses less digits than its factorization.

89640051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29880020.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 89640051 is about 9467.8429961634. The cubic root of 89640051 is about 447.5422404287.

The spelling of 89640051 in words is "eighty-nine million, six hundred forty thousand, fifty-one".