1723725613 has 2 divisors, whose sum is σ = 1723725614. Its totient is φ = 1723725612.

The previous prime is 1723725589. The next prime is 1723725631. The reversal of 1723725613 is 3165273271.

1723725613 = 29357² + 29358².

Together with next prime (1723725631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861892164 + 861833449 = 29358^2 + 29357^2 .

It is a cyclic number.

It is not a de Polignac number, because 1723725613 - 2¹³ = 1723717421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1723795613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861862806 + 861862807.

It is an arithmetic number, because the mean of its divisors is an integer number (861862807).

Almost surely, 2^1723725613 is an apocalyptic number.

1723725613 is the 29358-th centered square number.

It is an amenable number.

1723725613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1723725613 is an equidigital number, since it uses as much as digits as its factorization.

1723725613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 1723725613 is about 41517.7746633897. The cubic root of 1723725613 is about 1199.0097416132.

Adding to 1723725613 its reverse (3165273271), we get a palindrome (4888998884).

The spelling of 1723725613 in words is "one billion, seven hundred twenty-three million, seven hundred twenty-five thousand, six hundred thirteen".