720649327 has 2 divisors, whose sum is σ = 720649328. Its totient is φ = 720649326.

The previous prime is 720649277. The next prime is 720649337. The reversal of 720649327 is 723946027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720649327 - 2⁷ = 720649199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720649327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720649337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360324663 + 360324664.

It is an arithmetic number, because the mean of its divisors is an integer number (360324664).

Almost surely, 2^720649327 is an apocalyptic number.

720649327 is a deficient number, since it is larger than the sum of its proper divisors (1).

720649327 is an equidigital number, since it uses as much as digits as its factorization.

720649327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 720649327 is about 26844.9124975292. The cubic root of 720649327 is about 896.5503032726.

The spelling of 720649327 in words is "seven hundred twenty million, six hundred forty-nine thousand, three hundred twenty-seven".