405173669 has 2 divisors, whose sum is σ = 405173670. Its totient is φ = 405173668.

The previous prime is 405173663. The next prime is 405173683. The reversal of 405173669 is 966371504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357701569 + 47472100 = 18913^2 + 6890^2 .

It is a cyclic number.

It is not a de Polignac number, because 405173669 - 2²⁸ = 136738213 is a prime.

It is a super-2 number, since 2×405173669² = 328331404101843122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405173663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202586834 + 202586835.

It is an arithmetic number, because the mean of its divisors is an integer number (202586835).

Almost surely, 2^405173669 is an apocalyptic number.

It is an amenable number.

405173669 is a deficient number, since it is larger than the sum of its proper divisors (1).

405173669 is an equidigital number, since it uses as much as digits as its factorization.

405173669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 405173669 is about 20128.9261760284. The cubic root of 405173669 is about 739.9693614050.

The spelling of 405173669 in words is "four hundred five million, one hundred seventy-three thousand, six hundred sixty-nine".