99642719 has 8 divisors (see below), whose sum is σ = 109395408. Its totient is φ = 90005760.

The previous prime is 99642713. The next prime is 99642731. The reversal of 99642719 is 91724699.

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 99642719 - 2²⁰ = 98594143 is a prime.

It is a super-2 number, since 2×99642719² = 19857342899425922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99642713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27122 + ... + 30575.

It is an arithmetic number, because the mean of its divisors is an integer number (13674426).

Almost surely, 2^99642719 is an apocalyptic number.

99642719 is a deficient number, since it is larger than the sum of its proper divisors (9752689).

99642719 is a wasteful number, since it uses less digits than its factorization.

99642719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57865.

The product of its digits is 244944, while the sum is 47.

The square root of 99642719 is about 9982.1199652178. The cubic root of 99642719 is about 463.6054398876.

The spelling of 99642719 in words is "ninety-nine million, six hundred forty-two thousand, seven hundred nineteen".