63405287 has 4 divisors (see below), whose sum is σ = 69169416. Its totient is φ = 57641160.

The previous prime is 63405259. The next prime is 63405313. The reversal of 63405287 is 78250436.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63405287 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 (63405487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2882048 + ... + 2882069.

It is an arithmetic number, because the mean of its divisors is an integer number (17292354).

Almost surely, 2^63405287 is an apocalyptic number.

63405287 is a deficient number, since it is larger than the sum of its proper divisors (5764129).

63405287 is a wasteful number, since it uses less digits than its factorization.

63405287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5764128.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 63405287 is about 7962.7436854391. The cubic root of 63405287 is about 398.7571569356.

The spelling of 63405287 in words is "sixty-three million, four hundred five thousand, two hundred eighty-seven".