742594639 has 2 divisors, whose sum is σ = 742594640. Its totient is φ = 742594638.

The previous prime is 742594627. The next prime is 742594661. The reversal of 742594639 is 936495247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 742594639 - 2²¹ = 740497487 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 742594592 and 742594601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742594679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371297319 + 371297320.

It is an arithmetic number, because the mean of its divisors is an integer number (371297320).

Almost surely, 2^742594639 is an apocalyptic number.

742594639 is a deficient number, since it is larger than the sum of its proper divisors (1).

742594639 is an equidigital number, since it uses as much as digits as its factorization.

742594639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 49.

The square root of 742594639 is about 27250.5897000414. The cubic root of 742594639 is about 905.5600814597.

The spelling of 742594639 in words is "seven hundred forty-two million, five hundred ninety-four thousand, six hundred thirty-nine".