74440039 has 2 divisors, whose sum is σ = 74440040. Its totient is φ = 74440038.

The previous prime is 74439979. The next prime is 74440049. The reversal of 74440039 is 93004447.

It is a strong prime.

It is an emirp because it is prime and its reverse (93004447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74440039 - 2¹⁵ = 74407271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74440049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37220019 + 37220020.

It is an arithmetic number, because the mean of its divisors is an integer number (37220020).

Almost surely, 2^74440039 is an apocalyptic number.

74440039 is a deficient number, since it is larger than the sum of its proper divisors (1).

74440039 is an equidigital number, since it uses as much as digits as its factorization.

74440039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 74440039 is about 8627.8641041685. The cubic root of 74440039 is about 420.6641777788.

The spelling of 74440039 in words is "seventy-four million, four hundred forty thousand, thirty-nine".