63897757 has 8 divisors (see below), whose sum is σ = 79664832. Its totient is φ = 49790400.

The previous prime is 63897731. The next prime is 63897773. The reversal of 63897757 is 75779836.

It is a happy number.

63897757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 63897757 - 2⁷ = 63897629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63897787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414844 + ... + 414997.

It is an arithmetic number, because the mean of its divisors is an integer number (9958104).

Almost surely, 2^63897757 is an apocalyptic number.

It is an amenable number.

63897757 is a deficient number, since it is larger than the sum of its proper divisors (15767075).

63897757 is a wasteful number, since it uses less digits than its factorization.

63897757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829859.

The product of its digits is 2222640, while the sum is 52.

The square root of 63897757 is about 7993.6072583033. The cubic root of 63897757 is about 399.7868802201.

The spelling of 63897757 in words is "sixty-three million, eight hundred ninety-seven thousand, seven hundred fifty-seven".