74318621 has 8 divisors (see below), whose sum is σ = 80102400. Its totient is φ = 68544432.

The previous prime is 74318617. The next prime is 74318639. The reversal of 74318621 is 12681347.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74318621 - 2² = 74318617 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 (74318641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29780 + ... + 32178.

It is an arithmetic number, because the mean of its divisors is an integer number (10012800).

Almost surely, 2^74318621 is an apocalyptic number.

It is an amenable number.

74318621 is a deficient number, since it is larger than the sum of its proper divisors (5783779).

74318621 is a wasteful number, since it uses less digits than its factorization.

74318621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795.

The product of its digits is 8064, while the sum is 32.

The square root of 74318621 is about 8620.8248445262. The cubic root of 74318621 is about 420.4353403642.

Adding to 74318621 its reverse (12681347), we get a palindrome (86999968).

The spelling of 74318621 in words is "seventy-four million, three hundred eighteen thousand, six hundred twenty-one".