361842661 has 2 divisors, whose sum is σ = 361842662. Its totient is φ = 361842660.

The previous prime is 361842653. The next prime is 361842727. The reversal of 361842661 is 166248163.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354606561 + 7236100 = 18831^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 361842661 - 2³ = 361842653 is a prime.

It is a super-2 number, since 2×361842661² = 261860222639121842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 361842661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (361842641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180921330 + 180921331.

It is an arithmetic number, because the mean of its divisors is an integer number (180921331).

Almost surely, 2^361842661 is an apocalyptic number.

It is an amenable number.

361842661 is a deficient number, since it is larger than the sum of its proper divisors (1).

361842661 is an equidigital number, since it uses as much as digits as its factorization.

361842661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 361842661 is about 19022.1623639375. The cubic root of 361842661 is about 712.5903271550.

The spelling of 361842661 in words is "three hundred sixty-one million, eight hundred forty-two thousand, six hundred sixty-one".