740609509 has 2 divisors, whose sum is σ = 740609510. Its totient is φ = 740609508.

The previous prime is 740609497. The next prime is 740609543. The reversal of 740609509 is 905906047.

740609509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380445025 + 360164484 = 19505^2 + 18978^2 .

It is a cyclic number.

It is not a de Polignac number, because 740609509 - 2²⁷ = 606391781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (740609579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370304754 + 370304755.

It is an arithmetic number, because the mean of its divisors is an integer number (370304755).

Almost surely, 2^740609509 is an apocalyptic number.

It is an amenable number.

740609509 is a deficient number, since it is larger than the sum of its proper divisors (1).

740609509 is an equidigital number, since it uses as much as digits as its factorization.

740609509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 740609509 is about 27214.1417097802. The cubic root of 740609509 is about 904.7524363802.

The spelling of 740609509 in words is "seven hundred forty million, six hundred nine thousand, five hundred nine".