320536723 has 6 divisors (see below), whose sum is σ = 347090244. Its totient is φ = 295879896.

The previous prime is 320536703. The next prime is 320536781. The reversal of 320536723 is 327635023.

It is a de Polignac number, because none of the positive numbers 2^k-320536723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320536703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 948165 + ... + 948502.

It is an arithmetic number, because the mean of its divisors is an integer number (57848374).

Almost surely, 2^320536723 is an apocalyptic number.

320536723 is a deficient number, since it is larger than the sum of its proper divisors (26553521).

320536723 is a wasteful number, since it uses less digits than its factorization.

320536723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896693 (or 1896680 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 31.

The square root of 320536723 is about 17903.5393986776. The cubic root of 320536723 is about 684.3725748279.

The spelling of 320536723 in words is "three hundred twenty million, five hundred thirty-six thousand, seven hundred twenty-three".