74115731 has 2 divisors, whose sum is σ = 74115732. Its totient is φ = 74115730.

The previous prime is 74115721. The next prime is 74115779. The reversal of 74115731 is 13751147.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74115731 is a prime.

It is a super-2 number, since 2×74115731² = 10986283163328722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74115694 and 74115703.

It is not a weakly prime, because it can be changed into another prime (74115721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37057865 + 37057866.

It is an arithmetic number, because the mean of its divisors is an integer number (37057866).

Almost surely, 2^74115731 is an apocalyptic number.

74115731 is a deficient number, since it is larger than the sum of its proper divisors (1).

74115731 is an equidigital number, since it uses as much as digits as its factorization.

74115731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 29.

The square root of 74115731 is about 8609.0493668000. The cubic root of 74115731 is about 420.0523952019.

Adding to 74115731 its reverse (13751147), we get a palindrome (87866878).

The spelling of 74115731 in words is "seventy-four million, one hundred fifteen thousand, seven hundred thirty-one".