63381377 has 2 divisors, whose sum is σ = 63381378. Its totient is φ = 63381376.

The previous prime is 63381349. The next prime is 63381403. The reversal of 63381377 is 77318336.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36590401 + 26790976 = 6049^2 + 5176^2 .

It is a cyclic number.

It is not a de Polignac number, because 63381377 - 2¹⁰ = 63380353 is a prime.

It is a super-2 number, since 2×63381377² = 8034397900832258, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63381377.

It is not a weakly prime, because it can be changed into another prime (63381317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31690688 + 31690689.

It is an arithmetic number, because the mean of its divisors is an integer number (31690689).

Almost surely, 2^63381377 is an apocalyptic number.

It is an amenable number.

63381377 is a deficient number, since it is larger than the sum of its proper divisors (1).

63381377 is an equidigital number, since it uses as much as digits as its factorization.

63381377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 63381377 is about 7961.2421769470. The cubic root of 63381377 is about 398.7070271395.

The spelling of 63381377 in words is "sixty-three million, three hundred eighty-one thousand, three hundred seventy-seven".