99899791 has 8 divisors (see below), whose sum is σ = 100688000. Its totient is φ = 99114840.

The previous prime is 99899783. The next prime is 99899819. The reversal of 99899791 is 19799899.

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

It is a cyclic number.

It is not a de Polignac number, because 99899791 - 2³ = 99899783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99891791) 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, 122776 + ... + 123586.

It is an arithmetic number, because the mean of its divisors is an integer number (12586000).

Almost surely, 2^99899791 is an apocalyptic number.

99899791 is a deficient number, since it is larger than the sum of its proper divisors (788209).

99899791 is a wasteful number, since it uses less digits than its factorization.

99899791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629.

The product of its digits is 3306744, while the sum is 61.

The square root of 99899791 is about 9994.9882941402. The cubic root of 99899791 is about 464.0037885516.

The spelling of 99899791 in words is "ninety-nine million, eight hundred ninety-nine thousand, seven hundred ninety-one".