720977267 has 2 divisors, whose sum is σ = 720977268. Its totient is φ = 720977266.

The previous prime is 720977221. The next prime is 720977281. The reversal of 720977267 is 762779027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720977267 - 2⁶ = 720977203 is a prime.

It is a super-3 number, since 3×720977267³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (720977167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360488633 + 360488634.

It is an arithmetic number, because the mean of its divisors is an integer number (360488634).

Almost surely, 2^720977267 is an apocalyptic number.

720977267 is a deficient number, since it is larger than the sum of its proper divisors (1).

720977267 is an equidigital number, since it uses as much as digits as its factorization.

720977267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518616, while the sum is 47.

The square root of 720977267 is about 26851.0198502776. The cubic root of 720977267 is about 896.6862779224.

The spelling of 720977267 in words is "seven hundred twenty million, nine hundred seventy-seven thousand, two hundred sixty-seven".