74731 has 2 divisors, whose sum is σ = 74732. Its totient is φ = 74730.

The previous prime is 74729. The next prime is 74747. The reversal of 74731 is 13747.

74731 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74731 - 2¹ = 74729 is a prime.

It is a super-2 number, since 2×74731² = 11169444722, which contains 22 as substring.

Together with 74729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37365 + 37366.

It is an arithmetic number, because the mean of its divisors is an integer number (37366).

2⁷⁴⁷³¹ is an apocalyptic number.

74731 is a deficient number, since it is larger than the sum of its proper divisors (1).

74731 is an equidigital number, since it uses as much as digits as its factorization.

74731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 22.

The square root of 74731 is about 273.3697130262. The cubic root of 74731 is about 42.1211543361.

The spelling of 74731 in words is "seventy-four thousand, seven hundred thirty-one".