74731481 has 4 divisors (see below), whose sum is σ = 81525264. Its totient is φ = 67937700.

The previous prime is 74731477. The next prime is 74731493. The reversal of 74731481 is 18413747.

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 74731481 - 2² = 74731477 is a prime.

It is a super-2 number, since 2×74731481² = 11169588504906722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74731471) 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, 3396875 + ... + 3396896.

It is an arithmetic number, because the mean of its divisors is an integer number (20381316).

Almost surely, 2^74731481 is an apocalyptic number.

It is an amenable number.

74731481 is a deficient number, since it is larger than the sum of its proper divisors (6793783).

74731481 is a wasteful number, since it uses less digits than its factorization.

74731481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6793782.

The product of its digits is 18816, while the sum is 35.

The square root of 74731481 is about 8644.7371851318. The cubic root of 74731481 is about 421.2124470570.

The spelling of 74731481 in words is "seventy-four million, seven hundred thirty-one thousand, four hundred eighty-one".