63969534 has 32 divisors (see below), whose sum is σ = 147060000. Its totient is φ = 20587392.

The previous prime is 63969533. The next prime is 63969571. The reversal of 63969534 is 43596936.

It is a happy number.

63969534 is a `hidden beast` number, since 639 + 6 + 9 + 5 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 63969534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63969533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18859 + ... + 21990.

It is an arithmetic number, because the mean of its divisors is an integer number (4595625).

Almost surely, 2^63969534 is an apocalyptic number.

63969534 is an abundant number, since it is smaller than the sum of its proper divisors (83090466).

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

63969534 is a wasteful number, since it uses less digits than its factorization.

63969534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40889 (or 40883 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The square root of 63969534 is about 7998.0956483403. The cubic root of 63969534 is about 399.9365190926.

The spelling of 63969534 in words is "sixty-three million, nine hundred sixty-nine thousand, five hundred thirty-four".