63429681 has 16 divisors (see below), whose sum is σ = 96768000. Its totient is φ = 36203088.

The previous prime is 63429673. The next prime is 63429683. The reversal of 63429681 is 18692436.

It is not a de Polignac number, because 63429681 - 2³ = 63429673 is a prime.

It is a super-2 number, since 2×63429681² = 8046648863523522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63429683) 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, 29170 + ... + 31268.

It is an arithmetic number, because the mean of its divisors is an integer number (6048000).

Almost surely, 2^63429681 is an apocalyptic number.

It is an amenable number.

63429681 is a deficient number, since it is larger than the sum of its proper divisors (33338319).

63429681 is a wasteful number, since it uses less digits than its factorization.

63429681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548.

The product of its digits is 62208, while the sum is 39.

The square root of 63429681 is about 7964.2752965979. The cubic root of 63429681 is about 398.8082885018.

The spelling of 63429681 in words is "sixty-three million, four hundred twenty-nine thousand, six hundred eighty-one".