361877161 has 2 divisors, whose sum is σ = 361877162. Its totient is φ = 361877160.

The previous prime is 361877137. The next prime is 361877177. The reversal of 361877161 is 161778163.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346667161 + 15210000 = 18619^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 361877161 - 2⁹ = 361876649 is a prime.

It is equal to p_19406389 and since 361877161 and 19406389 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (361871161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180938580 + 180938581.

It is an arithmetic number, because the mean of its divisors is an integer number (180938581).

Almost surely, 2^361877161 is an apocalyptic number.

It is an amenable number.

361877161 is a deficient number, since it is larger than the sum of its proper divisors (1).

361877161 is an equidigital number, since it uses as much as digits as its factorization.

361877161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 361877161 is about 19023.0691792886. The cubic root of 361877161 is about 712.6129738167.

The spelling of 361877161 in words is "three hundred sixty-one million, eight hundred seventy-seven thousand, one hundred sixty-one".