361693609 has 2 divisors, whose sum is σ = 361693610. Its totient is φ = 361693608.

The previous prime is 361693603. The next prime is 361693613. The reversal of 361693609 is 906396163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344288025 + 17405584 = 18555^2 + 4172^2 .

It is a cyclic number.

It is not a de Polignac number, because 361693609 - 2³ = 361693601 is a prime.

It is not a weakly prime, because it can be changed into another prime (361693601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180846804 + 180846805.

It is an arithmetic number, because the mean of its divisors is an integer number (180846805).

Almost surely, 2^361693609 is an apocalyptic number.

It is an amenable number.

361693609 is a deficient number, since it is larger than the sum of its proper divisors (1).

361693609 is an equidigital number, since it uses as much as digits as its factorization.

361693609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 361693609 is about 19018.2441092757. The cubic root of 361693609 is about 712.4924691520.

The spelling of 361693609 in words is "three hundred sixty-one million, six hundred ninety-three thousand, six hundred nine".