63997461 has 24 divisors (see below), whose sum is σ = 104326560. Its totient is φ = 37447200.

The previous prime is 63997441. The next prime is 63997481. The reversal of 63997461 is 16479936.

63997461 is a `hidden beast` number, since 639 + 9 + 7 + 4 + 6 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (63997441) and next prime (63997481).

It is not a de Polignac number, because 63997461 - 2⁶ = 63997397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63997441) 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 23 ways as a sum of consecutive naturals, for example, 8275 + ... + 14016.

It is an arithmetic number, because the mean of its divisors is an integer number (4346940).

Almost surely, 2^63997461 is an apocalyptic number.

It is an amenable number.

63997461 is a deficient number, since it is larger than the sum of its proper divisors (40329099).

63997461 is a wasteful number, since it uses less digits than its factorization.

63997461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22337 (or 22334 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 63997461 is about 7999.8413109261. The cubic root of 63997461 is about 399.9947103467.

The spelling of 63997461 in words is "sixty-three million, nine hundred ninety-seven thousand, four hundred sixty-one".