74672209 has 4 divisors (see below), whose sum is σ = 76408816. Its totient is φ = 72935604.

The previous prime is 74672201. The next prime is 74672231. The reversal of 74672209 is 90227647.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74672209 - 2³ = 74672201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74672201) 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, 868239 + ... + 868324.

It is an arithmetic number, because the mean of its divisors is an integer number (19102204).

Almost surely, 2^74672209 is an apocalyptic number.

It is an amenable number.

74672209 is a deficient number, since it is larger than the sum of its proper divisors (1736607).

74672209 is a wasteful number, since it uses less digits than its factorization.

74672209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736606.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 74672209 is about 8641.3082921511. The cubic root of 74672209 is about 421.1010584462.

The spelling of 74672209 in words is "seventy-four million, six hundred seventy-two thousand, two hundred nine".