74009994731 has 2 divisors, whose sum is σ = 74009994732. Its totient is φ = 74009994730.

The previous prime is 74009994647. The next prime is 74009994809. The reversal of 74009994731 is 13749990047.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74009994731 - 2¹⁴ = 74009978347 is a prime.

It is a super-2 number, since 2×74009994731² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (74009994431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37004997365 + 37004997366.

It is an arithmetic number, because the mean of its divisors is an integer number (37004997366).

Almost surely, 2^74009994731 is an apocalyptic number.

74009994731 is a deficient number, since it is larger than the sum of its proper divisors (1).

74009994731 is an equidigital number, since it uses as much as digits as its factorization.

74009994731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 53.

The spelling of 74009994731 in words is "seventy-four billion, nine million, nine hundred ninety-four thousand, seven hundred thirty-one".