74797939 has 2 divisors, whose sum is σ = 74797940. Its totient is φ = 74797938.

The previous prime is 74797913. The next prime is 74797949. The reversal of 74797939 is 93979747.

It is a strong prime.

It is an emirp because it is prime and its reverse (93979747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74797939 - 2¹³ = 74789747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74797939.

It is not a weakly prime, because it can be changed into another prime (74797949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37398969 + 37398970.

It is an arithmetic number, because the mean of its divisors is an integer number (37398970).

Almost surely, 2^74797939 is an apocalyptic number.

74797939 is a deficient number, since it is larger than the sum of its proper divisors (1).

74797939 is an equidigital number, since it uses as much as digits as its factorization.

74797939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000564, while the sum is 55.

The square root of 74797939 is about 8648.5801724907. The cubic root of 74797939 is about 421.3372701462.

The spelling of 74797939 in words is "seventy-four million, seven hundred ninety-seven thousand, nine hundred thirty-nine".