74919613 has 4 divisors (see below), whose sum is σ = 74939580. Its totient is φ = 74899648.

The previous prime is 74919563. The next prime is 74919617. The reversal of 74919613 is 31691947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31691947 = 7 ⋅4527421.

It can be written as a sum of positive squares in 2 ways, for example, as 26853124 + 48066489 = 5182^2 + 6933^2 .

It is a cyclic number.

It is not a de Polignac number, because 74919613 - 2⁹ = 74919101 is a prime.

It is a super-2 number, since 2×74919613² = 11225896824139538, which contains 22 as substring.

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 (74919617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2470 + ... + 12487.

It is an arithmetic number, because the mean of its divisors is an integer number (18734895).

Almost surely, 2^74919613 is an apocalyptic number.

It is an amenable number.

74919613 is a deficient number, since it is larger than the sum of its proper divisors (19967).

74919613 is a wasteful number, since it uses less digits than its factorization.

74919613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19966.

The product of its digits is 40824, while the sum is 40.

The square root of 74919613 is about 8655.6116479426. The cubic root of 74919613 is about 421.5656098514.

The spelling of 74919613 in words is "seventy-four million, nine hundred nineteen thousand, six hundred thirteen".