74397919 has 2 divisors, whose sum is σ = 74397920. Its totient is φ = 74397918.

The previous prime is 74397889. The next prime is 74397937. The reversal of 74397919 is 91979347.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (91979347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74397919 - 2⁵ = 74397887 is a prime.

It is a super-2 number, since 2×74397919² = 11070100703061122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74397419) 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, 37198959 + 37198960.

It is an arithmetic number, because the mean of its divisors is an integer number (37198960).

Almost surely, 2^74397919 is an apocalyptic number.

74397919 is a deficient number, since it is larger than the sum of its proper divisors (1).

74397919 is an equidigital number, since it uses as much as digits as its factorization.

74397919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 49.

The square root of 74397919 is about 8625.4228302153. The cubic root of 74397919 is about 420.5848221064.

The spelling of 74397919 in words is "seventy-four million, three hundred ninety-seven thousand, nine hundred nineteen".