74831 has 2 divisors, whose sum is σ = 74832. Its totient is φ = 74830.

The previous prime is 74827. The next prime is 74843. The reversal of 74831 is 13847.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74831 - 2² = 74827 is a prime.

It is a super-2 number, since 2×74831² = 11199357122, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 16.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 74797 and 74806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37415 + 37416.

It is an arithmetic number, because the mean of its divisors is an integer number (37416).

2⁷⁴⁸³¹ is an apocalyptic number.

74831 is a deficient number, since it is larger than the sum of its proper divisors (1).

74831 is an equidigital number, since it uses as much as digits as its factorization.

74831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 74831 is about 273.5525543657. The cubic root of 74831 is about 42.1399338611.

The spelling of 74831 in words is "seventy-four thousand, eight hundred thirty-one".