63787573 has 2 divisors, whose sum is σ = 63787574. Its totient is φ = 63787572.

The previous prime is 63787561. The next prime is 63787609. The reversal of 63787573 is 37578736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55249489 + 8538084 = 7433^2 + 2922^2 .

It is a cyclic number.

It is not a de Polignac number, because 63787573 - 2²⁵ = 30233141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63787543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31893786 + 31893787.

It is an arithmetic number, because the mean of its divisors is an integer number (31893787).

Almost surely, 2^63787573 is an apocalyptic number.

It is an amenable number.

63787573 is a deficient number, since it is larger than the sum of its proper divisors (1).

63787573 is an equidigital number, since it uses as much as digits as its factorization.

63787573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 46.

The square root of 63787573 is about 7986.7122772766. The cubic root of 63787573 is about 399.5569532050.

The spelling of 63787573 in words is "sixty-three million, seven hundred eighty-seven thousand, five hundred seventy-three".