63969697 has 8 divisors (see below), whose sum is σ = 70669440. Its totient is φ = 57417360.

The previous prime is 63969683. The next prime is 63969727. The reversal of 63969697 is 79696936.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63969697 - 2²³ = 55581089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63969667) 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 7 ways as a sum of consecutive naturals, for example, 35938 + ... + 37675.

It is an arithmetic number, because the mean of its divisors is an integer number (8833680).

Almost surely, 2^63969697 is an apocalyptic number.

It is an amenable number.

63969697 is a deficient number, since it is larger than the sum of its proper divisors (6699743).

63969697 is a wasteful number, since it uses less digits than its factorization.

63969697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73703.

The product of its digits is 3306744, while the sum is 55.

The square root of 63969697 is about 7998.1058382595. The cubic root of 63969697 is about 399.9368587835.

The spelling of 63969697 in words is "sixty-three million, nine hundred sixty-nine thousand, six hundred ninety-seven".