74513381 has 8 divisors (see below), whose sum is σ = 76051800. Its totient is φ = 72990720.

The previous prime is 74513357. The next prime is 74513437. The reversal of 74513381 is 18331547.

It can be written as a sum of positive squares in 4 ways, for example, as 13032100 + 61481281 = 3610^2 + 7841^2 .

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 74513381 - 2⁶ = 74513317 is a prime.

It is a super-2 number, since 2×74513381² = 11104487896102322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74513311) 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, 5861 + ... + 13541.

It is an arithmetic number, because the mean of its divisors is an integer number (9506475).

Almost surely, 2^74513381 is an apocalyptic number.

It is an amenable number.

74513381 is a deficient number, since it is larger than the sum of its proper divisors (1538419).

74513381 is a wasteful number, since it uses less digits than its factorization.

74513381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7879.

The product of its digits is 10080, while the sum is 32.

The square root of 74513381 is about 8632.1133565309. The cubic root of 74513381 is about 420.8022854677.

The spelling of 74513381 in words is "seventy-four million, five hundred thirteen thousand, three hundred eighty-one".