720371669 has 2 divisors, whose sum is σ = 720371670. Its totient is φ = 720371668.

The previous prime is 720371633. The next prime is 720371677. The reversal of 720371669 is 966173027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 490091044 + 230280625 = 22138^2 + 15175^2 .

It is an emirp because it is prime and its reverse (966173027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720371669 - 2²⁸ = 451936213 is a prime.

It is a super-2 number, since 2×720371669² = 1037870682995691122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720373669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360185834 + 360185835.

It is an arithmetic number, because the mean of its divisors is an integer number (360185835).

Almost surely, 2^720371669 is an apocalyptic number.

It is an amenable number.

720371669 is a deficient number, since it is larger than the sum of its proper divisors (1).

720371669 is an equidigital number, since it uses as much as digits as its factorization.

720371669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 720371669 is about 26839.7404793713. The cubic root of 720371669 is about 896.4351449323.

The spelling of 720371669 in words is "seven hundred twenty million, three hundred seventy-one thousand, six hundred sixty-nine".