74336621 has 4 divisors (see below), whose sum is σ = 77568672. Its totient is φ = 71104572.

The previous prime is 74336609. The next prime is 74336623. The reversal of 74336621 is 12663347.

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.

It is a cyclic number.

It is not a de Polignac number, because 74336621 - 2¹⁸ = 74074477 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 (74336623) 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, 1615991 + ... + 1616036.

It is an arithmetic number, because the mean of its divisors is an integer number (19392168).

Almost surely, 2^74336621 is an apocalyptic number.

It is an amenable number.

74336621 is a deficient number, since it is larger than the sum of its proper divisors (3232051).

74336621 is a wasteful number, since it uses less digits than its factorization.

74336621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232050.

The product of its digits is 18144, while the sum is 32.

The square root of 74336621 is about 8621.8687649488. The cubic root of 74336621 is about 420.4692808273.

Adding to 74336621 its reverse (12663347), we get a palindrome (86999968).

The spelling of 74336621 in words is "seventy-four million, three hundred thirty-six thousand, six hundred twenty-one".