79998761 has 8 divisors (see below), whose sum is σ = 84289920. Its totient is φ = 75775392.

The previous prime is 79998757. The next prime is 79998769. The reversal of 79998761 is 16789997.

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 79998761 - 2² = 79998757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79998697 and 79998706.

It is not an unprimeable number, because it can be changed into a prime (79998769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14516 + ... + 19253.

It is an arithmetic number, because the mean of its divisors is an integer number (10536240).

Almost surely, 2^79998761 is an apocalyptic number.

It is an amenable number.

79998761 is a deficient number, since it is larger than the sum of its proper divisors (4291159).

79998761 is a wasteful number, since it uses less digits than its factorization.

79998761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33895.

The product of its digits is 1714608, while the sum is 56.

The square root of 79998761 is about 8944.2026475254. The cubic root of 79998761 is about 430.8847135411.

The spelling of 79998761 in words is "seventy-nine million, nine hundred ninety-eight thousand, seven hundred sixty-one".