361404209 has 2 divisors, whose sum is σ = 361404210. Its totient is φ = 361404208.

The previous prime is 361404193. The next prime is 361404259. The reversal of 361404209 is 902404163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 333610225 + 27793984 = 18265^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 361404209 - 2⁴ = 361404193 is a prime.

It is a super-2 number, since 2×361404209² = 261226004565831362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (361404259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180702104 + 180702105.

It is an arithmetic number, because the mean of its divisors is an integer number (180702105).

Almost surely, 2^361404209 is an apocalyptic number.

It is an amenable number.

361404209 is a deficient number, since it is larger than the sum of its proper divisors (1).

361404209 is an equidigital number, since it uses as much as digits as its factorization.

361404209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 361404209 is about 19010.6341030487. The cubic root of 361404209 is about 712.3023908335.

The spelling of 361404209 in words is "three hundred sixty-one million, four hundred four thousand, two hundred nine".