723131273 has 2 divisors, whose sum is σ = 723131274. Its totient is φ = 723131272.

The previous prime is 723131267. The next prime is 723131323. The reversal of 723131273 is 372131327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 718936969 + 4194304 = 26813^2 + 2048^2 .

It is a cyclic number.

It is not a de Polignac number, because 723131273 - 2⁴ = 723131257 is a prime.

It is not a weakly prime, because it can be changed into another prime (723131263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361565636 + 361565637.

It is an arithmetic number, because the mean of its divisors is an integer number (361565637).

Almost surely, 2^723131273 is an apocalyptic number.

It is an amenable number.

723131273 is a deficient number, since it is larger than the sum of its proper divisors (1).

723131273 is an equidigital number, since it uses as much as digits as its factorization.

723131273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 29.

The square root of 723131273 is about 26891.1002564045. The cubic root of 723131273 is about 897.5783760048.

The spelling of 723131273 in words is "seven hundred twenty-three million, one hundred thirty-one thousand, two hundred seventy-three".