74399399 has 2 divisors, whose sum is σ = 74399400. Its totient is φ = 74399398.

The previous prime is 74399393. The next prime is 74399419. The reversal of 74399399 is 99399347.

It is a weak prime.

It is an emirp because it is prime and its reverse (99399347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74399399 is a prime.

It is a super-2 number, since 2×74399399² = 11070541143122402, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74399399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74399393) 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, 37199699 + 37199700.

It is an arithmetic number, because the mean of its divisors is an integer number (37199700).

Almost surely, 2^74399399 is an apocalyptic number.

74399399 is a deficient number, since it is larger than the sum of its proper divisors (1).

74399399 is an equidigital number, since it uses as much as digits as its factorization.

74399399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 53.

The square root of 74399399 is about 8625.5086226842. The cubic root of 74399399 is about 420.5876109900.

The spelling of 74399399 in words is "seventy-four million, three hundred ninety-nine thousand, three hundred ninety-nine".