725168617 has 2 divisors, whose sum is σ = 725168618. Its totient is φ = 725168616.

The previous prime is 725168597. The next prime is 725168627. The reversal of 725168617 is 716861527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493550656 + 231617961 = 22216^2 + 15219^2 .

It is a cyclic number.

It is not a de Polignac number, because 725168617 - 2⁷ = 725168489 is a prime.

It is a super-3 number, since 3×725168617³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (725168627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362584308 + 362584309.

It is an arithmetic number, because the mean of its divisors is an integer number (362584309).

Almost surely, 2^725168617 is an apocalyptic number.

It is an amenable number.

725168617 is a deficient number, since it is larger than the sum of its proper divisors (1).

725168617 is an equidigital number, since it uses as much as digits as its factorization.

725168617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 725168617 is about 26928.9549927211. The cubic root of 725168617 is about 898.4205288774.

The spelling of 725168617 in words is "seven hundred twenty-five million, one hundred sixty-eight thousand, six hundred seventeen".