99720718 has 16 divisors (see below), whose sum is σ = 151061760. Its totient is φ = 49369600.

The previous prime is 99720703. The next prime is 99720727. The reversal of 99720718 is 81702799.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106878 + ... + 107806.

It is an arithmetic number, because the mean of its divisors is an integer number (9441360).

Almost surely, 2^99720718 is an apocalyptic number.

99720718 is a deficient number, since it is larger than the sum of its proper divisors (51341042).

99720718 is a wasteful number, since it uses less digits than its factorization.

99720718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 99720718 is about 9986.0261365570. The cubic root of 99720718 is about 463.7263764021.

The spelling of 99720718 in words is "ninety-nine million, seven hundred twenty thousand, seven hundred eighteen".