726917057 has 2 divisors, whose sum is σ = 726917058. Its totient is φ = 726917056.

The previous prime is 726917027. The next prime is 726917063. The reversal of 726917057 is 750719627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500685376 + 226231681 = 22376^2 + 15041^2 .

It is a cyclic number.

It is not a de Polignac number, because 726917057 - 2¹⁰ = 726916033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 726916999 and 726917017.

It is not a weakly prime, because it can be changed into another prime (726917017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363458528 + 363458529.

It is an arithmetic number, because the mean of its divisors is an integer number (363458529).

Almost surely, 2^726917057 is an apocalyptic number.

It is an amenable number.

726917057 is a deficient number, since it is larger than the sum of its proper divisors (1).

726917057 is an equidigital number, since it uses as much as digits as its factorization.

726917057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 185220, while the sum is 44.

The square root of 726917057 is about 26961.3993887558. The cubic root of 726917057 is about 899.1420041185.

The spelling of 726917057 in words is "seven hundred twenty-six million, nine hundred seventeen thousand, fifty-seven".