74840513 has 4 divisors (see below), whose sum is σ = 81644208. Its totient is φ = 68036820.

The previous prime is 74840509. The next prime is 74840537. The reversal of 74840513 is 31504847.

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: 31504847 = 11 ⋅2864077.

It is a cyclic number.

It is not a de Polignac number, because 74840513 - 2² = 74840509 is a prime.

It is a super-2 number, since 2×74840513² = 11202204772206338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74840513.

It is not an unprimeable number, because it can be changed into a prime (74840543) 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, 3401831 + ... + 3401852.

It is an arithmetic number, because the mean of its divisors is an integer number (20411052).

Almost surely, 2^74840513 is an apocalyptic number.

It is an amenable number.

74840513 is a deficient number, since it is larger than the sum of its proper divisors (6803695).

74840513 is a wasteful number, since it uses less digits than its factorization.

74840513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6803694.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 74840513 is about 8651.0411512141. The cubic root of 74840513 is about 421.4171948557.

The spelling of 74840513 in words is "seventy-four million, eight hundred forty thousand, five hundred thirteen".