99307765 has 4 divisors (see below), whose sum is σ = 119169324. Its totient is φ = 79446208.

The previous prime is 99307723. The next prime is 99307801. The reversal of 99307765 is 56770399.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57653649 + 41654116 = 7593^2 + 6454^2 .

It is a cyclic number.

It is not a de Polignac number, because 99307765 - 2¹⁵ = 99274997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9930772 + ... + 9930781.

It is an arithmetic number, because the mean of its divisors is an integer number (29792331).

Almost surely, 2^99307765 is an apocalyptic number.

It is an amenable number.

99307765 is a deficient number, since it is larger than the sum of its proper divisors (19861559).

99307765 is a wasteful number, since it uses less digits than its factorization.

99307765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19861558.

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 99307765 is about 9965.3281431170. The cubic root of 99307765 is about 463.0853790647.

The spelling of 99307765 in words is "ninety-nine million, three hundred seven thousand, seven hundred sixty-five".