63745861 has 2 divisors, whose sum is σ = 63745862. Its totient is φ = 63745860.

The previous prime is 63745853. The next prime is 63745879. The reversal of 63745861 is 16854736.

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., 32273761 + 31472100 = 5681^2 + 5610^2 .

It is a cyclic number.

It is not a de Polignac number, because 63745861 - 2³ = 63745853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63745961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31872930 + 31872931.

It is an arithmetic number, because the mean of its divisors is an integer number (31872931).

Almost surely, 2^63745861 is an apocalyptic number.

It is an amenable number.

63745861 is a deficient number, since it is larger than the sum of its proper divisors (1).

63745861 is an equidigital number, since it uses as much as digits as its factorization.

63745861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 63745861 is about 7984.1005128944. The cubic root of 63745861 is about 399.4698413901.

The spelling of 63745861 in words is "sixty-three million, seven hundred forty-five thousand, eight hundred sixty-one".