74621413 has 4 divisors (see below), whose sum is σ = 75033868. Its totient is φ = 74208960.

The previous prime is 74621411. The next prime is 74621419. The reversal of 74621413 is 31412647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31412647 = 7 ⋅4487521.

It can be written as a sum of positive squares in 2 ways, for example, as 4848804 + 69772609 = 2202^2 + 8353^2 .

It is a cyclic number.

It is not a de Polignac number, because 74621413 - 2¹ = 74621411 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 (74621411) 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, 205956 + ... + 206317.

It is an arithmetic number, because the mean of its divisors is an integer number (18758467).

Almost surely, 2^74621413 is an apocalyptic number.

It is an amenable number.

74621413 is a deficient number, since it is larger than the sum of its proper divisors (412455).

74621413 is a wasteful number, since it uses less digits than its factorization.

74621413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412454.

The product of its digits is 4032, while the sum is 28.

The square root of 74621413 is about 8638.3686538605. The cubic root of 74621413 is about 421.0055516896.

The spelling of 74621413 in words is "seventy-four million, six hundred twenty-one thousand, four hundred thirteen".