720707823 has 36 divisors (see below), whose sum is σ = 1168693344. Its totient is φ = 427468800.

The previous prime is 720707807. The next prime is 720707831. The reversal of 720707823 is 328707027.

It is not a de Polignac number, because 720707823 - 2⁴ = 720707807 is a prime.

It is a super-2 number, since 2×720707823² = 1038839532266798658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720707803) 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 35 ways as a sum of consecutive naturals, for example, 44143 + ... + 58223.

It is an arithmetic number, because the mean of its divisors is an integer number (32463704).

Almost surely, 2^720707823 is an apocalyptic number.

720707823 is a deficient number, since it is larger than the sum of its proper divisors (447985521).

720707823 is a wasteful number, since it uses less digits than its factorization.

720707823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14156 (or 14142 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 720707823 is about 26846.0019928480. The cubic root of 720707823 is about 896.5745606498.

It can be divided in two parts, 7 and 20707823, that added together give a triangular number (20707830 = T₆₄₃₅).

The spelling of 720707823 in words is "seven hundred twenty million, seven hundred seven thousand, eight hundred twenty-three".