720753377 has 8 divisors (see below), whose sum is σ = 740626536. Its totient is φ = 700900992.

The previous prime is 720753347. The next prime is 720753389. The reversal of 720753377 is 773357027.

It can be written as a sum of positive squares in 4 ways, for example, as 200958976 + 519794401 = 14176^2 + 22799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720753377 - 2²² = 716559073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720753347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87563 + ... + 95439.

It is an arithmetic number, because the mean of its divisors is an integer number (92578317).

Almost surely, 2^720753377 is an apocalyptic number.

It is an amenable number.

720753377 is a deficient number, since it is larger than the sum of its proper divisors (19873159).

720753377 is a wasteful number, since it uses less digits than its factorization.

720753377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387.

The product of its (nonzero) digits is 216090, while the sum is 41.

The square root of 720753377 is about 26846.8504111749. The cubic root of 720753377 is about 896.5934502727.

The spelling of 720753377 in words is "seven hundred twenty million, seven hundred fifty-three thousand, three hundred seventy-seven".