361161869 has 2 divisors, whose sum is σ = 361161870. Its totient is φ = 361161868.

The previous prime is 361161817. The next prime is 361161887. The reversal of 361161869 is 968161163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304083844 + 57078025 = 17438^2 + 7555^2 .

It is an emirp because it is prime and its reverse (968161163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 361161869 - 2⁸ = 361161613 is a prime.

It is a super-2 number, since 2×361161869² = 260875791239146322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (361161809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180580934 + 180580935.

It is an arithmetic number, because the mean of its divisors is an integer number (180580935).

Almost surely, 2^361161869 is an apocalyptic number.

It is an amenable number.

361161869 is a deficient number, since it is larger than the sum of its proper divisors (1).

361161869 is an equidigital number, since it uses as much as digits as its factorization.

361161869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 361161869 is about 19004.2592331298. The cubic root of 361161869 is about 712.1431435098.

The spelling of 361161869 in words is "three hundred sixty-one million, one hundred sixty-one thousand, eight hundred sixty-nine".