74172213 has 8 divisors (see below), whose sum is σ = 109884800. Its totient is φ = 49448124.

The previous prime is 74172199. The next prime is 74172221. The reversal of 74172213 is 31227147.

It is a happy number.

It is not a de Polignac number, because 74172213 - 2⁹ = 74171701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2747119 = 74172213 / (7 + 4 + 1 + 7 + 2 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74172313) 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, 1373533 + ... + 1373586.

It is an arithmetic number, because the mean of its divisors is an integer number (13735600).

Almost surely, 2^74172213 is an apocalyptic number.

It is an amenable number.

74172213 is a deficient number, since it is larger than the sum of its proper divisors (35712587).

74172213 is a wasteful number, since it uses less digits than its factorization.

74172213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747128 (or 2747122 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 74172213 is about 8612.3291274777. The cubic root of 74172213 is about 420.1590723978.

The spelling of 74172213 in words is "seventy-four million, one hundred seventy-two thousand, two hundred thirteen".