74040247 has 2 divisors, whose sum is σ = 74040248. Its totient is φ = 74040246.

The previous prime is 74040227. The next prime is 74040251. The reversal of 74040247 is 74204047.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74040247 - 2⁷ = 74040119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74040217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37020123 + 37020124.

It is an arithmetic number, because the mean of its divisors is an integer number (37020124).

Almost surely, 2^74040247 is an apocalyptic number.

74040247 is a deficient number, since it is larger than the sum of its proper divisors (1).

74040247 is an equidigital number, since it uses as much as digits as its factorization.

74040247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 74040247 is about 8604.6642584124. The cubic root of 74040247 is about 419.9097444004.

The spelling of 74040247 in words is "seventy-four million, forty thousand, two hundred forty-seven".