79749217 has 8 divisors (see below), whose sum is σ = 83010240. Its totient is φ = 76522320.

The previous prime is 79749203. The next prime is 79749239. The reversal of 79749217 is 71294797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79749217 - 2¹¹ = 79747169 is a prime.

It is a super-2 number, since 2×79749217² = 12719875224226178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79749247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3709 + ... + 13162.

It is an arithmetic number, because the mean of its divisors is an integer number (10376280).

Almost surely, 2^79749217 is an apocalyptic number.

It is an amenable number.

79749217 is a deficient number, since it is larger than the sum of its proper divisors (3261023).

79749217 is a wasteful number, since it uses less digits than its factorization.

79749217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17063.

The product of its digits is 222264, while the sum is 46.

The square root of 79749217 is about 8930.2417100547. The cubic root of 79749217 is about 430.4362203807.

The spelling of 79749217 in words is "seventy-nine million, seven hundred forty-nine thousand, two hundred seventeen".