405231017 has 2 divisors, whose sum is σ = 405231018. Its totient is φ = 405231016.

The previous prime is 405230971. The next prime is 405231059. The reversal of 405231017 is 710132504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397962601 + 7268416 = 19949^2 + 2696^2 .

It is a cyclic number.

It is not a de Polignac number, because 405231017 - 2¹⁴ = 405214633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 405230983 and 405231001.

It is not a weakly prime, because it can be changed into another prime (405231317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202615508 + 202615509.

It is an arithmetic number, because the mean of its divisors is an integer number (202615509).

Almost surely, 2^405231017 is an apocalyptic number.

It is an amenable number.

405231017 is a deficient number, since it is larger than the sum of its proper divisors (1).

405231017 is an equidigital number, since it uses as much as digits as its factorization.

405231017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 405231017 is about 20130.3506427484. The cubic root of 405231017 is about 740.0042713413.

The spelling of 405231017 in words is "four hundred five million, two hundred thirty-one thousand, seventeen".