74749209 has 4 divisors (see below), whose sum is σ = 99665616. Its totient is φ = 49832804.

The previous prime is 74749193. The next prime is 74749229. The reversal of 74749209 is 90294747.

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 74749209 - 2⁴ = 74749193 is a prime.

It is a super-2 number, since 2×74749209² = 11174888492251362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74749229) 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, 12458199 + ... + 12458204.

It is an arithmetic number, because the mean of its divisors is an integer number (24916404).

Almost surely, 2^74749209 is an apocalyptic number.

It is an amenable number.

74749209 is a deficient number, since it is larger than the sum of its proper divisors (24916407).

74749209 is a wasteful number, since it uses less digits than its factorization.

74749209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24916406.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 74749209 is about 8645.7624880632. The cubic root of 74749209 is about 421.2457514680.

The spelling of 74749209 in words is "seventy-four million, seven hundred forty-nine thousand, two hundred nine".