63885557 has 2 divisors, whose sum is σ = 63885558. Its totient is φ = 63885556.

The previous prime is 63885553. The next prime is 63885583. The reversal of 63885557 is 75558836.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58461316 + 5424241 = 7646^2 + 2329^2 .

It is a cyclic number.

It is not a de Polignac number, because 63885557 - 2² = 63885553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63885551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31942778 + 31942779.

It is an arithmetic number, because the mean of its divisors is an integer number (31942779).

Almost surely, 2^63885557 is an apocalyptic number.

It is an amenable number.

63885557 is a deficient number, since it is larger than the sum of its proper divisors (1).

63885557 is an equidigital number, since it uses as much as digits as its factorization.

63885557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 47.

The square root of 63885557 is about 7992.8441120793. The cubic root of 63885557 is about 399.7614348283.

The spelling of 63885557 in words is "sixty-three million, eight hundred eighty-five thousand, five hundred fifty-seven".