74102731 has 2 divisors, whose sum is σ = 74102732. Its totient is φ = 74102730.

The previous prime is 74102729. The next prime is 74102753. The reversal of 74102731 is 13720147.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74102731 - 2¹ = 74102729 is a prime.

It is a super-2 number, since 2×74102731² = 10982429483316722, which contains 22 as substring.

Together with 74102729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 74102696 and 74102705.

It is not a weakly prime, because it can be changed into another prime (74102131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37051365 + 37051366.

It is an arithmetic number, because the mean of its divisors is an integer number (37051366).

Almost surely, 2^74102731 is an apocalyptic number.

74102731 is a deficient number, since it is larger than the sum of its proper divisors (1).

74102731 is an equidigital number, since it uses as much as digits as its factorization.

74102731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 74102731 is about 8608.2943142065. The cubic root of 74102731 is about 420.0278345121.

Adding to 74102731 its reverse (13720147), we get a palindrome (87822878).

The spelling of 74102731 in words is "seventy-four million, one hundred two thousand, seven hundred thirty-one".