754639609 has 2 divisors, whose sum is σ = 754639610. Its totient is φ = 754639608.

The previous prime is 754639597. The next prime is 754639619. The reversal of 754639609 is 906936457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620010000 + 134629609 = 24900^2 + 11603^2 .

It is a cyclic number.

It is not a de Polignac number, because 754639609 - 2⁵ = 754639577 is a prime.

It is not a weakly prime, because it can be changed into another prime (754639619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377319804 + 377319805.

It is an arithmetic number, because the mean of its divisors is an integer number (377319805).

Almost surely, 2^754639609 is an apocalyptic number.

It is an amenable number.

754639609 is a deficient number, since it is larger than the sum of its proper divisors (1).

754639609 is an equidigital number, since it uses as much as digits as its factorization.

754639609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The square root of 754639609 is about 27470.7045595849. The cubic root of 754639609 is about 910.4299417463.

It can be divided in two parts, 75463960 and 9, that added together give a square (75463969 = 8687²).

The spelling of 754639609 in words is "seven hundred fifty-four million, six hundred thirty-nine thousand, six hundred nine".