1723413157 has 2 divisors, whose sum is σ = 1723413158. Its totient is φ = 1723413156.

The previous prime is 1723413149. The next prime is 1723413173. The reversal of 1723413157 is 7513143271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1723412196 + 961 = 41514^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 1723413157 - 2³ = 1723413149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1723413257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861706578 + 861706579.

It is an arithmetic number, because the mean of its divisors is an integer number (861706579).

Almost surely, 2^1723413157 is an apocalyptic number.

It is an amenable number.

1723413157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1723413157 is an equidigital number, since it uses as much as digits as its factorization.

1723413157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 34.

The square root of 1723413157 is about 41514.0115744070. The cubic root of 1723413157 is about 1198.9372899376.

The spelling of 1723413157 in words is "one billion, seven hundred twenty-three million, four hundred thirteen thousand, one hundred fifty-seven".