74393947 has 2 divisors, whose sum is σ = 74393948. Its totient is φ = 74393946.

The previous prime is 74393929. The next prime is 74393959. The reversal of 74393947 is 74939347.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74393947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74393897 and 74393906.

It is not a weakly prime, because it can be changed into another prime (74399947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37196973 + 37196974.

It is an arithmetic number, because the mean of its divisors is an integer number (37196974).

Almost surely, 2^74393947 is an apocalyptic number.

74393947 is a deficient number, since it is larger than the sum of its proper divisors (1).

74393947 is an equidigital number, since it uses as much as digits as its factorization.

74393947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 46.

The square root of 74393947 is about 8625.1925775602. The cubic root of 74393947 is about 420.5773371629.

The spelling of 74393947 in words is "seventy-four million, three hundred ninety-three thousand, nine hundred forty-seven".