740638729 has 2 divisors, whose sum is σ = 740638730. Its totient is φ = 740638728.

The previous prime is 740638697. The next prime is 740638733. The reversal of 740638729 is 927836047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657409600 + 83229129 = 25640^2 + 9123^2 .

It is a cyclic number.

It is not a de Polignac number, because 740638729 - 2⁵ = 740638697 is a prime.

It is not a weakly prime, because it can be changed into another prime (740638739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370319364 + 370319365.

It is an arithmetic number, because the mean of its divisors is an integer number (370319365).

Almost surely, 2^740638729 is an apocalyptic number.

It is an amenable number.

740638729 is a deficient number, since it is larger than the sum of its proper divisors (1).

740638729 is an equidigital number, since it uses as much as digits as its factorization.

740638729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 740638729 is about 27214.6785577195. The cubic root of 740638729 is about 904.7643349215.

The spelling of 740638729 in words is "seven hundred forty million, six hundred thirty-eight thousand, seven hundred twenty-nine".