79749667 has 4 divisors (see below), whose sum is σ = 79859200. Its totient is φ = 79640136.

The previous prime is 79749661. The next prime is 79749673. The reversal of 79749667 is 76694797.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76694797 = 337 ⋅227581.

It is an interprime number because it is at equal distance from previous prime (79749661) and next prime (79749673).

It is a cyclic number.

It is not a de Polignac number, because 79749667 - 2¹⁵ = 79716899 is a prime.

It is a super-2 number, since 2×79749667² = 12720018773221778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79749661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53667 + ... + 55132.

It is an arithmetic number, because the mean of its divisors is an integer number (19964800).

Almost surely, 2^79749667 is an apocalyptic number.

79749667 is a deficient number, since it is larger than the sum of its proper divisors (109533).

79749667 is a wasteful number, since it uses less digits than its factorization.

79749667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109532.

The product of its digits is 4000752, while the sum is 55.

The square root of 79749667 is about 8930.2669053058. The cubic root of 79749667 is about 430.4370299851.

The spelling of 79749667 in words is "seventy-nine million, seven hundred forty-nine thousand, six hundred sixty-seven".