405994208189 has 2 divisors, whose sum is σ = 405994208190. Its totient is φ = 405994208188.

The previous prime is 405994208183. The next prime is 405994208273. The reversal of 405994208189 is 981802499504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268235947225 + 137758260964 = 517915^2 + 371158^2 .

It is a cyclic number.

It is not a de Polignac number, because 405994208189 - 2³² = 401699240893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405994208183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202997104094 + 202997104095.

It is an arithmetic number, because the mean of its divisors is an integer number (202997104095).

Almost surely, 2^405994208189 is an apocalyptic number.

It is an amenable number.

405994208189 is a deficient number, since it is larger than the sum of its proper divisors (1).

405994208189 is an equidigital number, since it uses as much as digits as its factorization.

405994208189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 59.

The spelling of 405994208189 in words is "four hundred five billion, nine hundred ninety-four million, two hundred eight thousand, one hundred eighty-nine".