99773915 has 8 divisors (see below), whose sum is σ = 120788928. Its totient is φ = 79112320.

The previous prime is 99773911. The next prime is 99773917. The reversal of 99773915 is 51937799.

It is a happy number.

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

It is not a de Polignac number, because 99773915 - 2² = 99773911 is a prime.

It is a super-2 number, since 2×99773915² = 19909668228854450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99773911) 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, 87731 + ... + 88860.

It is an arithmetic number, because the mean of its divisors is an integer number (15098616).

Almost surely, 2^99773915 is an apocalyptic number.

99773915 is a deficient number, since it is larger than the sum of its proper divisors (21015013).

99773915 is a wasteful number, since it uses less digits than its factorization.

99773915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176709.

The product of its digits is 535815, while the sum is 50.

The square root of 99773915 is about 9988.6893534637. The cubic root of 99773915 is about 463.8088215457.

The spelling of 99773915 in words is "ninety-nine million, seven hundred seventy-three thousand, nine hundred fifteen".