63506969 has 4 divisors (see below), whose sum is σ = 63561396. Its totient is φ = 63452544.

The previous prime is 63506957. The next prime is 63506981. The reversal of 63506969 is 96960536.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (63506957) and next prime (63506981).

It can be written as a sum of positive squares in 2 ways, for example, as 13987600 + 49519369 = 3740^2 + 7037^2 .

It is a cyclic number.

It is not a de Polignac number, because 63506969 - 2²⁰ = 62458393 is a prime.

It is a super-2 number, since 2×63506969² = 8066270223133922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63506939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25424 + ... + 27809.

It is an arithmetic number, because the mean of its divisors is an integer number (15890349).

Almost surely, 2^63506969 is an apocalyptic number.

It is an amenable number.

63506969 is a deficient number, since it is larger than the sum of its proper divisors (54427).

63506969 is a wasteful number, since it uses less digits than its factorization.

63506969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54426.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 63506969 is about 7969.1259872084. The cubic root of 63506969 is about 398.9702031546.

The spelling of 63506969 in words is "sixty-three million, five hundred six thousand, nine hundred sixty-nine".