74328749 has 4 divisors (see below), whose sum is σ = 81085920. Its totient is φ = 67571580.

The previous prime is 74328733. The next prime is 74328757. The reversal of 74328749 is 94782347.

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 74328749 - 2⁴ = 74328733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74322749) 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, 3378569 + ... + 3378590.

It is an arithmetic number, because the mean of its divisors is an integer number (20271480).

Almost surely, 2^74328749 is an apocalyptic number.

It is an amenable number.

74328749 is a deficient number, since it is larger than the sum of its proper divisors (6757171).

74328749 is a wasteful number, since it uses less digits than its factorization.

74328749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6757170.

The product of its digits is 338688, while the sum is 44.

The square root of 74328749 is about 8621.4122393028. The cubic root of 74328749 is about 420.4544382056.

It can be divided in two parts, 743 and 28749, that added together give a palindrome (29492).

The spelling of 74328749 in words is "seventy-four million, three hundred twenty-eight thousand, seven hundred forty-nine".