99722779 has 16 divisors (see below), whose sum is σ = 112698432. Its totient is φ = 87550848.

The previous prime is 99722761. The next prime is 99722863. The reversal of 99722779 is 97722799.

It is a cyclic number.

It is not a de Polignac number, because 99722779 - 2⁵ = 99722747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99722179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58057 + ... + 59749.

It is an arithmetic number, because the mean of its divisors is an integer number (7043652).

Almost surely, 2^99722779 is an apocalyptic number.

99722779 is a deficient number, since it is larger than the sum of its proper divisors (12975653).

99722779 is a wasteful number, since it uses less digits than its factorization.

99722779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926.

The product of its digits is 1000188, while the sum is 52.

The square root of 99722779 is about 9986.1293302260. The cubic root of 99722779 is about 463.7295711026.

The spelling of 99722779 in words is "ninety-nine million, seven hundred twenty-two thousand, seven hundred seventy-nine".