405412717 has 2 divisors, whose sum is σ = 405412718. Its totient is φ = 405412716.

The previous prime is 405412691. The next prime is 405412739. The reversal of 405412717 is 717214504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246929796 + 158482921 = 15714^2 + 12589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405412717 is a prime.

It is a super-2 number, since 2×405412717² = 328718942210644178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405412757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202706358 + 202706359.

It is an arithmetic number, because the mean of its divisors is an integer number (202706359).

Almost surely, 2^405412717 is an apocalyptic number.

It is an amenable number.

405412717 is a deficient number, since it is larger than the sum of its proper divisors (1).

405412717 is an equidigital number, since it uses as much as digits as its factorization.

405412717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 405412717 is about 20134.8632227785. The cubic root of 405412717 is about 740.1148573848.

The spelling of 405412717 in words is "four hundred five million, four hundred twelve thousand, seven hundred seventeen".