99800765 has 8 divisors (see below), whose sum is σ = 122682168. Its totient is φ = 77893120.

The previous prime is 99800713. The next prime is 99800783. The reversal of 99800765 is 56700899.

It can be written as a sum of positive squares in 4 ways, for example, as 14182756 + 85618009 = 3766^2 + 9253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99800765 - 2²⁰ = 98752189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243212 + ... + 243621.

It is an arithmetic number, because the mean of its divisors is an integer number (15335271).

Almost surely, 2^99800765 is an apocalyptic number.

It is an amenable number.

99800765 is a deficient number, since it is larger than the sum of its proper divisors (22881403).

99800765 is a wasteful number, since it uses less digits than its factorization.

99800765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486879.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 99800765 is about 9990.0332832278. The cubic root of 99800765 is about 463.8504227662.

The spelling of 99800765 in words is "ninety-nine million, eight hundred thousand, seven hundred sixty-five".