74404013 has 4 divisors (see below), whose sum is σ = 74834268. Its totient is φ = 73973760.

The previous prime is 74403991. The next prime is 74404037. The reversal of 74404013 is 31040447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31040447 = 37 ⋅838931.

It can be written as a sum of positive squares in 2 ways, for example, as 57123364 + 17280649 = 7558^2 + 4157^2 .

It is a cyclic number.

It is not a de Polignac number, because 74404013 - 2⁶ = 74403949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 74404013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74404073) 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, 214868 + ... + 215213.

It is an arithmetic number, because the mean of its divisors is an integer number (18708567).

Almost surely, 2^74404013 is an apocalyptic number.

It is an amenable number.

74404013 is a deficient number, since it is larger than the sum of its proper divisors (430255).

74404013 is a wasteful number, since it uses less digits than its factorization.

74404013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430254.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 74404013 is about 8625.7760810260. The cubic root of 74404013 is about 420.5963052857.

The spelling of 74404013 in words is "seventy-four million, four hundred four thousand, thirteen".