74744381 has 4 divisors (see below), whose sum is σ = 74933052. Its totient is φ = 74555712.

The previous prime is 74744377. The next prime is 74744389. The reversal of 74744381 is 18344747.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64947481 + 9796900 = 8059^2 + 3130^2 .

It is a cyclic number.

It is not a de Polignac number, because 74744381 - 2² = 74744377 is a prime.

It is a super-3 number, since 3×74744381³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74744389) 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, 93740 + ... + 94533.

It is an arithmetic number, because the mean of its divisors is an integer number (18733263).

Almost surely, 2^74744381 is an apocalyptic number.

It is an amenable number.

74744381 is a deficient number, since it is larger than the sum of its proper divisors (188671).

74744381 is a wasteful number, since it uses less digits than its factorization.

74744381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188670.

The product of its digits is 75264, while the sum is 38.

The square root of 74744381 is about 8645.4832716280. The cubic root of 74744381 is about 421.2366819483.

The spelling of 74744381 in words is "seventy-four million, seven hundred forty-four thousand, three hundred eighty-one".