361672189 has 2 divisors, whose sum is σ = 361672190. Its totient is φ = 361672188.

The previous prime is 361672187. The next prime is 361672271. The reversal of 361672189 is 981276163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274399225 + 87272964 = 16565^2 + 9342^2 .

It is a cyclic number.

It is not a de Polignac number, because 361672189 - 2¹ = 361672187 is a prime.

Together with 361672187, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (361672187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180836094 + 180836095.

It is an arithmetic number, because the mean of its divisors is an integer number (180836095).

Almost surely, 2^361672189 is an apocalyptic number.

It is an amenable number.

361672189 is a deficient number, since it is larger than the sum of its proper divisors (1).

361672189 is an equidigital number, since it uses as much as digits as its factorization.

361672189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 361672189 is about 19017.6809574669. The cubic root of 361672189 is about 712.4784039417.

The spelling of 361672189 in words is "three hundred sixty-one million, six hundred seventy-two thousand, one hundred eighty-nine".