74384993 has 2 divisors, whose sum is σ = 74384994. Its totient is φ = 74384992.

The previous prime is 74384987. The next prime is 74385007. The reversal of 74384993 is 39948347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69689104 + 4695889 = 8348^2 + 2167^2 .

It is an emirp because it is prime and its reverse (39948347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74384993 - 2⁶ = 74384929 is a prime.

It is a super-2 number, since 2×74384993² = 11066254367220098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74384923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37192496 + 37192497.

It is an arithmetic number, because the mean of its divisors is an integer number (37192497).

Almost surely, 2^74384993 is an apocalyptic number.

It is an amenable number.

74384993 is a deficient number, since it is larger than the sum of its proper divisors (1).

74384993 is an equidigital number, since it uses as much as digits as its factorization.

74384993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 74384993 is about 8624.6735010666. The cubic root of 74384993 is about 420.5604630277.

The spelling of 74384993 in words is "seventy-four million, three hundred eighty-four thousand, nine hundred ninety-three".