79691098 has 4 divisors (see below), whose sum is σ = 119536650. Its totient is φ = 39845548.

The previous prime is 79691093. The next prime is 79691137. The reversal of 79691098 is 89019697.

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

It can be written as a sum of positive squares in only one way, i.e., 77739489 + 1951609 = 8817^2 + 1397^2 .

It is a super-2 number, since 2×79691098² = 12701342200891208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (79691093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19922773 + ... + 19922776.

Almost surely, 2^79691098 is an apocalyptic number.

79691098 is a deficient number, since it is larger than the sum of its proper divisors (39845552).

79691098 is a wasteful number, since it uses less digits than its factorization.

79691098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39845551.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 79691098 is about 8926.9870617135. The cubic root of 79691098 is about 430.3316316746.

The spelling of 79691098 in words is "seventy-nine million, six hundred ninety-one thousand, ninety-eight".