723966857 has 2 divisors, whose sum is σ = 723966858. Its totient is φ = 723966856.

The previous prime is 723966853. The next prime is 723966869. The reversal of 723966857 is 758669327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564727696 + 159239161 = 23764^2 + 12619^2 .

It is a cyclic number.

It is not a de Polignac number, because 723966857 - 2² = 723966853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 723966799 and 723966808.

It is not a weakly prime, because it can be changed into another prime (723966853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361983428 + 361983429.

It is an arithmetic number, because the mean of its divisors is an integer number (361983429).

Almost surely, 2^723966857 is an apocalyptic number.

It is an amenable number.

723966857 is a deficient number, since it is larger than the sum of its proper divisors (1).

723966857 is an equidigital number, since it uses as much as digits as its factorization.

723966857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 53.

The square root of 723966857 is about 26906.6322121517. The cubic root of 723966857 is about 897.9239626062.

The spelling of 723966857 in words is "seven hundred twenty-three million, nine hundred sixty-six thousand, eight hundred fifty-seven".