74399387 has 2 divisors, whose sum is σ = 74399388. Its totient is φ = 74399386.

The previous prime is 74399371. The next prime is 74399393. The reversal of 74399387 is 78399347.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74399387 - 2⁴ = 74399371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74299387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37199693 + 37199694.

It is an arithmetic number, because the mean of its divisors is an integer number (37199694).

Almost surely, 2^74399387 is an apocalyptic number.

74399387 is a deficient number, since it is larger than the sum of its proper divisors (1).

74399387 is an equidigital number, since it uses as much as digits as its factorization.

74399387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The square root of 74399387 is about 8625.5079270730. The cubic root of 74399387 is about 420.5875883776.

The spelling of 74399387 in words is "seventy-four million, three hundred ninety-nine thousand, three hundred eighty-seven".