74425639 has 2 divisors, whose sum is σ = 74425640. Its totient is φ = 74425638.

The previous prime is 74425613. The next prime is 74425667. The reversal of 74425639 is 93652447.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74425639 - 2¹⁹ = 73901351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74425139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37212819 + 37212820.

It is an arithmetic number, because the mean of its divisors is an integer number (37212820).

Almost surely, 2^74425639 is an apocalyptic number.

74425639 is a deficient number, since it is larger than the sum of its proper divisors (1).

74425639 is an equidigital number, since it uses as much as digits as its factorization.

74425639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 74425639 is about 8627.0295583126. The cubic root of 74425639 is about 420.6370510027.

The spelling of 74425639 in words is "seventy-four million, four hundred twenty-five thousand, six hundred thirty-nine".