99772565 has 8 divisors (see below), whose sum is σ = 119968128. Its totient is φ = 79657360.

The previous prime is 99772529. The next prime is 99772567. The reversal of 99772565 is 56527799.

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

It is not a de Polignac number, because 99772565 - 2⁶ = 99772501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99772567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17321 + ... + 22350.

It is an arithmetic number, because the mean of its divisors is an integer number (14996016).

Almost surely, 2^99772565 is an apocalyptic number.

It is an amenable number.

99772565 is a deficient number, since it is larger than the sum of its proper divisors (20195563).

99772565 is a wasteful number, since it uses less digits than its factorization.

99772565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40179.

The product of its digits is 1190700, while the sum is 50.

The square root of 99772565 is about 9988.6217768018. The cubic root of 99772565 is about 463.8067296672.

The spelling of 99772565 in words is "ninety-nine million, seven hundred seventy-two thousand, five hundred sixty-five".