63695557 has 2 divisors, whose sum is σ = 63695558. Its totient is φ = 63695556.

The previous prime is 63695497. The next prime is 63695561. The reversal of 63695557 is 75559636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43678881 + 20016676 = 6609^2 + 4474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63695557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63693557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31847778 + 31847779.

It is an arithmetic number, because the mean of its divisors is an integer number (31847779).

Almost surely, 2^63695557 is an apocalyptic number.

It is an amenable number.

63695557 is a deficient number, since it is larger than the sum of its proper divisors (1).

63695557 is an equidigital number, since it uses as much as digits as its factorization.

63695557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 850500, while the sum is 46.

The square root of 63695557 is about 7980.9496302132. The cubic root of 63695557 is about 399.3647353813.

The spelling of 63695557 in words is "sixty-three million, six hundred ninety-five thousand, five hundred fifty-seven".