63091181 has 2 divisors, whose sum is σ = 63091182. Its totient is φ = 63091180.

The previous prime is 63091163. The next prime is 63091243. The reversal of 63091181 is 18119036.

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., 44342281 + 18748900 = 6659^2 + 4330^2 .

It is a cyclic number.

It is not a de Polignac number, because 63091181 - 2⁶ = 63091117 is a prime.

It is a super-2 number, since 2×63091181² = 7960994239949522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63091111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31545590 + 31545591.

It is an arithmetic number, because the mean of its divisors is an integer number (31545591).

Almost surely, 2^63091181 is an apocalyptic number.

It is an amenable number.

63091181 is a deficient number, since it is larger than the sum of its proper divisors (1).

63091181 is an equidigital number, since it uses as much as digits as its factorization.

63091181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 63091181 is about 7942.9957195003. The cubic root of 63091181 is about 398.0975935515.

The spelling of 63091181 in words is "sixty-three million, ninety-one thousand, one hundred eighty-one".