74644379 has 4 divisors (see below), whose sum is σ = 74670120. Its totient is φ = 74618640.

The previous prime is 74644351. The next prime is 74644391. The reversal of 74644379 is 97344647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97344647 = 43 ⋅2263829.

It is a cyclic number.

It is not a de Polignac number, because 74644379 - 2¹² = 74640283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74644309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7874 + ... + 14535.

It is an arithmetic number, because the mean of its divisors is an integer number (18667530).

Almost surely, 2^74644379 is an apocalyptic number.

74644379 is a deficient number, since it is larger than the sum of its proper divisors (25741).

74644379 is a wasteful number, since it uses less digits than its factorization.

74644379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25740.

The product of its digits is 508032, while the sum is 44.

The square root of 74644379 is about 8639.6978535132. The cubic root of 74644379 is about 421.0487377822.

The spelling of 74644379 in words is "seventy-four million, six hundred forty-four thousand, three hundred seventy-nine".