63569997 has 6 divisors (see below), whose sum is σ = 91823342. Its totient is φ = 42379992.

The previous prime is 63569983. The next prime is 63570011. The reversal of 63569997 is 79996536.

It is an interprime number because it is at equal distance from previous prime (63569983) and next prime (63570011).

It can be written as a sum of positive squares in only one way, i.e., 52620516 + 10949481 = 7254^2 + 3309^2 .

It is not a de Polignac number, because 63569997 - 2⁸ = 63569741 is a prime.

It is a super-2 number, since 2×63569997² = 8082289037160018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63569917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3531658 + ... + 3531675.

Almost surely, 2^63569997 is an apocalyptic number.

It is an amenable number.

63569997 is a deficient number, since it is larger than the sum of its proper divisors (28253345).

63569997 is a wasteful number, since it uses less digits than its factorization.

63569997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7063339 (or 7063336 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 63569997 is about 7973.0795179780. The cubic root of 63569997 is about 399.1021465726.

The spelling of 63569997 in words is "sixty-three million, five hundred sixty-nine thousand, nine hundred ninety-seven".