74379581 has 8 divisors (see below), whose sum is σ = 75654624. Its totient is φ = 73109520.

The previous prime is 74379559. The next prime is 74379587. The reversal of 74379581 is 18597347.

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 74379581 - 2¹⁴ = 74363197 is a prime.

It is a super-2 number, since 2×74379581² = 11064644139471122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74379587) 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, 40166 + ... + 41976.

It is an arithmetic number, because the mean of its divisors is an integer number (9456828).

Almost surely, 2^74379581 is an apocalyptic number.

It is an amenable number.

74379581 is a deficient number, since it is larger than the sum of its proper divisors (1275043).

74379581 is a wasteful number, since it uses less digits than its factorization.

74379581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491.

The product of its digits is 211680, while the sum is 44.

The square root of 74379581 is about 8624.3597443520. The cubic root of 74379581 is about 420.5502632623.

The spelling of 74379581 in words is "seventy-four million, three hundred seventy-nine thousand, five hundred eighty-one".