79498991 has 16 divisors (see below), whose sum is σ = 94018848. Its totient is φ = 66268800.

The previous prime is 79498963. The next prime is 79498997. The reversal of 79498991 is 19989497.

It is a de Polignac number, because none of the positive numbers 2^k-79498991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79498997) 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 15 ways as a sum of consecutive naturals, for example, 20681 + ... + 24221.

It is an arithmetic number, because the mean of its divisors is an integer number (5876178).

Almost surely, 2^79498991 is an apocalyptic number.

79498991 is a deficient number, since it is larger than the sum of its proper divisors (14519857).

79498991 is a wasteful number, since it uses less digits than its factorization.

79498991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722.

The product of its digits is 1469664, while the sum is 56.

The square root of 79498991 is about 8916.2206679736. The cubic root of 79498991 is about 429.9855610800.

The spelling of 79498991 in words is "seventy-nine million, four hundred ninety-eight thousand, nine hundred ninety-one".