99999722 has 8 divisors (see below), whose sum is σ = 156521376. Its totient is φ = 47825932.

The previous prime is 99999721. The next prime is 99999773. The reversal of 99999722 is 22799999.

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

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99999721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086908 + ... + 1086999.

It is an arithmetic number, because the mean of its divisors is an integer number (19565172).

Almost surely, 2^99999722 is an apocalyptic number.

99999722 is a deficient number, since it is larger than the sum of its proper divisors (56521654).

99999722 is a wasteful number, since it uses less digits than its factorization.

99999722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173932.

The product of its digits is 1653372, while the sum is 56.

The square root of 99999722 is about 9999.9860999903. The cubic root of 99999722 is about 464.1584532403.

The spelling of 99999722 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred twenty-two".