79699663 has 4 divisors (see below), whose sum is σ = 79736800. Its totient is φ = 79662528.

The previous prime is 79699657. The next prime is 79699673. The reversal of 79699663 is 36699697.

It is a happy number.

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 79699663 - 2¹³ = 79691471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79699673) 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, 15138 + ... + 19711.

It is an arithmetic number, because the mean of its divisors is an integer number (19934200).

Almost surely, 2^79699663 is an apocalyptic number.

79699663 is a deficient number, since it is larger than the sum of its proper divisors (37137).

79699663 is a wasteful number, since it uses less digits than its factorization.

79699663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37136.

The product of its digits is 3306744, while the sum is 55.

The square root of 79699663 is about 8927.4667739511. The cubic root of 79699663 is about 430.3470481116.

The spelling of 79699663 in words is "seventy-nine million, six hundred ninety-nine thousand, six hundred sixty-three".