405725317 has 2 divisors, whose sum is σ = 405725318. Its totient is φ = 405725316.

The previous prime is 405725273. The next prime is 405725321. The reversal of 405725317 is 713527504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382241601 + 23483716 = 19551^2 + 4846^2 .

It is a cyclic number.

It is not a de Polignac number, because 405725317 - 2⁷ = 405725189 is a prime.

It is a super-2 number, since 2×405725317² = 329226065709500978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405725347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202862658 + 202862659.

It is an arithmetic number, because the mean of its divisors is an integer number (202862659).

Almost surely, 2^405725317 is an apocalyptic number.

It is an amenable number.

405725317 is a deficient number, since it is larger than the sum of its proper divisors (1).

405725317 is an equidigital number, since it uses as much as digits as its factorization.

405725317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 405725317 is about 20142.6243821405. The cubic root of 405725317 is about 740.3050343375.

The spelling of 405725317 in words is "four hundred five million, seven hundred twenty-five thousand, three hundred seventeen".