63969378 has 16 divisors (see below), whose sum is σ = 139569696. Its totient is φ = 19384640.

The previous prime is 63969359. The next prime is 63969379. The reversal of 63969378 is 87396936.

It is a happy 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 63969378.

It is not an unprimeable number, because it can be changed into a prime (63969379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484551 + ... + 484682.

It is an arithmetic number, because the mean of its divisors is an integer number (8723106).

Almost surely, 2^63969378 is an apocalyptic number.

63969378 is an abundant number, since it is smaller than the sum of its proper divisors (75600318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63969378 is a wasteful number, since it uses less digits than its factorization.

63969378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969249.

The product of its digits is 1469664, while the sum is 51.

The square root of 63969378 is about 7998.0858960129. The cubic root of 63969378 is about 399.9361939892.

The spelling of 63969378 in words is "sixty-three million, nine hundred sixty-nine thousand, three hundred seventy-eight".