79989019 has 8 divisors (see below), whose sum is σ = 87353712. Its totient is φ = 72639840.

The previous prime is 79988983. The next prime is 79989023. The reversal of 79989019 is 91098997.

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 79989019 - 2¹¹ = 79986971 is a prime.

It is a super-2 number, since 2×79989019² = 12796486321164722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79989059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8697 + ... + 15349.

It is an arithmetic number, because the mean of its divisors is an integer number (10919214).

Almost surely, 2^79989019 is an apocalyptic number.

79989019 is a deficient number, since it is larger than the sum of its proper divisors (7364693).

79989019 is a wasteful number, since it uses less digits than its factorization.

79989019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7757.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 79989019 is about 8943.6580323713. The cubic root of 79989019 is about 430.8672222315.

The spelling of 79989019 in words is "seventy-nine million, nine hundred eighty-nine thousand, nineteen".