76998739 has 4 divisors (see below), whose sum is σ = 79079824. Its totient is φ = 74917656.

The previous prime is 76998709. The next prime is 76998743. The reversal of 76998739 is 93789967.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 76998739 - 2⁵ = 76998707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76998709) 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 3 ways as a sum of consecutive naturals, for example, 1040487 + ... + 1040560.

It is an arithmetic number, because the mean of its divisors is an integer number (19769956).

Almost surely, 2^76998739 is an apocalyptic number.

76998739 is a deficient number, since it is larger than the sum of its proper divisors (2081085).

76998739 is a wasteful number, since it uses less digits than its factorization.

76998739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081084.

The product of its digits is 5143824, while the sum is 58.

The square root of 76998739 is about 8774.8925349545. The cubic root of 76998739 is about 425.4297641185.

The spelling of 76998739 in words is "seventy-six million, nine hundred ninety-eight thousand, seven hundred thirty-nine".