405481189 has 2 divisors, whose sum is σ = 405481190. Its totient is φ = 405481188.

The previous prime is 405481183. The next prime is 405481207. The reversal of 405481189 is 981184504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397404225 + 8076964 = 19935^2 + 2842^2 .

It is a cyclic number.

It is not a de Polignac number, because 405481189 - 2⁵ = 405481157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405481183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202740594 + 202740595.

It is an arithmetic number, because the mean of its divisors is an integer number (202740595).

Almost surely, 2^405481189 is an apocalyptic number.

It is an amenable number.

405481189 is a deficient number, since it is larger than the sum of its proper divisors (1).

405481189 is an equidigital number, since it uses as much as digits as its factorization.

405481189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 405481189 is about 20136.5634853616. The cubic root of 405481189 is about 740.1565221621.

The spelling of 405481189 in words is "four hundred five million, four hundred eighty-one thousand, one hundred eighty-nine".