64363181 has 2 divisors, whose sum is σ = 64363182. Its totient is φ = 64363180.

The previous prime is 64363171. The next prime is 64363193. The reversal of 64363181 is 18136346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42367081 + 21996100 = 6509^2 + 4690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64363181 is a prime.

It is a super-2 number, since 2×64363181² = 8285238136877522, 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 (64363121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32181590 + 32181591.

It is an arithmetic number, because the mean of its divisors is an integer number (32181591).

Almost surely, 2^64363181 is an apocalyptic number.

It is an amenable number.

64363181 is a deficient number, since it is larger than the sum of its proper divisors (1).

64363181 is an equidigital number, since it uses as much as digits as its factorization.

64363181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 64363181 is about 8022.6667012908. Note that the first 3 decimals coincide. The cubic root of 64363181 is about 400.7552003670.

The spelling of 64363181 in words is "sixty-four million, three hundred sixty-three thousand, one hundred eighty-one".