74549613 has 4 divisors (see below), whose sum is σ = 99399488. Its totient is φ = 49699740.

The previous prime is 74549609. The next prime is 74549621. The reversal of 74549613 is 31694547.

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: 31694547 = 3 ⋅10564849.

It is not a de Polignac number, because 74549613 - 2² = 74549609 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 (74549623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12424933 + ... + 12424938.

It is an arithmetic number, because the mean of its divisors is an integer number (24849872).

Almost surely, 2^74549613 is an apocalyptic number.

It is an amenable number.

74549613 is a deficient number, since it is larger than the sum of its proper divisors (24849875).

74549613 is a wasteful number, since it uses less digits than its factorization.

74549613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24849874.

The product of its digits is 90720, while the sum is 39.

The square root of 74549613 is about 8634.2117764160. The cubic root of 74549613 is about 420.8704792054.

The spelling of 74549613 in words is "seventy-four million, five hundred forty-nine thousand, six hundred thirteen".