63956969 has 4 divisors (see below), whose sum is σ = 64159044. Its totient is φ = 63754896.

The previous prime is 63956957. The next prime is 63957011. The reversal of 63956969 is 96965936.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1357225 + 62599744 = 1165^2 + 7912^2 .

It is a cyclic number.

It is not a de Polignac number, because 63956969 - 2²⁴ = 47179753 is a prime.

It is a super-2 number, since 2×63956969² = 8180987767333922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63956969.

It is not an unprimeable number, because it can be changed into a prime (63956939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100562 + ... + 101195.

It is an arithmetic number, because the mean of its divisors is an integer number (16039761).

Almost surely, 2^63956969 is an apocalyptic number.

It is an amenable number.

63956969 is a deficient number, since it is larger than the sum of its proper divisors (202075).

63956969 is a wasteful number, since it uses less digits than its factorization.

63956969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202074.

The product of its digits is 2361960, while the sum is 53.

The square root of 63956969 is about 7997.3101102808. The cubic root of 63956969 is about 399.9103319840.

The spelling of 63956969 in words is "sixty-three million, nine hundred fifty-six thousand, nine hundred sixty-nine".