74157613 has 4 divisors (see below), whose sum is σ = 74176380. Its totient is φ = 74138848.

The previous prime is 74157581. The next prime is 74157617. The reversal of 74157613 is 31675147.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16670889 + 57486724 = 4083^2 + 7582^2 .

It is a cyclic number.

It is not a de Polignac number, because 74157613 - 2⁵ = 74157581 is a prime.

It is a super-3 number, since 3×74157613³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74157617) 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, 898 + ... + 12211.

It is an arithmetic number, because the mean of its divisors is an integer number (18544095).

Almost surely, 2^74157613 is an apocalyptic number.

It is an amenable number.

74157613 is a deficient number, since it is larger than the sum of its proper divisors (18767).

74157613 is a wasteful number, since it uses less digits than its factorization.

74157613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18766.

The product of its digits is 17640, while the sum is 34.

The square root of 74157613 is about 8611.4814637204. The cubic root of 74157613 is about 420.1315026618.

The spelling of 74157613 in words is "seventy-four million, one hundred fifty-seven thousand, six hundred thirteen".