74131613 has 4 divisors (see below), whose sum is σ = 75855648. Its totient is φ = 72407580.

The previous prime is 74131601. The next prime is 74131621. The reversal of 74131613 is 31613147.

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: 31613147 = 499 ⋅63353.

It is a cyclic number.

It is not a de Polignac number, because 74131613 - 2¹⁶ = 74066077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74131693) 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, 861953 + ... + 862038.

It is an arithmetic number, because the mean of its divisors is an integer number (18963912).

Almost surely, 2^74131613 is an apocalyptic number.

It is an amenable number.

74131613 is a deficient number, since it is larger than the sum of its proper divisors (1724035).

74131613 is a wasteful number, since it uses less digits than its factorization.

74131613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724034.

The product of its digits is 1512, while the sum is 26.

The square root of 74131613 is about 8609.9717188850. The cubic root of 74131613 is about 420.0823969104.

The spelling of 74131613 in words is "seventy-four million, one hundred thirty-one thousand, six hundred thirteen".