74407549 has 4 divisors (see below), whose sum is σ = 74427264. Its totient is φ = 74387836.

The previous prime is 74407547. The next prime is 74407573. The reversal of 74407549 is 94570447.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94570447 = 269 ⋅351563.

It is a cyclic number.

It is not a de Polignac number, because 74407549 - 2¹ = 74407547 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74407547) 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, 2227 + ... + 12400.

It is an arithmetic number, because the mean of its divisors is an integer number (18606816).

Almost surely, 2^74407549 is an apocalyptic number.

It is an amenable number.

74407549 is a deficient number, since it is larger than the sum of its proper divisors (19715).

74407549 is a wasteful number, since it uses less digits than its factorization.

74407549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19714.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 74407549 is about 8625.9810456550. The cubic root of 74407549 is about 420.6029680310.

The spelling of 74407549 in words is "seventy-four million, four hundred seven thousand, five hundred forty-nine".