366239561 has 2 divisors, whose sum is σ = 366239562. Its totient is φ = 366239560.

The previous prime is 366239543. The next prime is 366239567. The reversal of 366239561 is 165932663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363855625 + 2383936 = 19075^2 + 1544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-366239561 is a prime.

It is not a weakly prime, because it can be changed into another prime (366239567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183119780 + 183119781.

It is an arithmetic number, because the mean of its divisors is an integer number (183119781).

Almost surely, 2^366239561 is an apocalyptic number.

It is an amenable number.

366239561 is a deficient number, since it is larger than the sum of its proper divisors (1).

366239561 is an equidigital number, since it uses as much as digits as its factorization.

366239561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 41.

The square root of 366239561 is about 19137.3864725568. The cubic root of 366239561 is about 715.4650411689.

The spelling of 366239561 in words is "three hundred sixty-six million, two hundred thirty-nine thousand, five hundred sixty-one".