63899477 has 4 divisors (see below), whose sum is σ = 64001376. Its totient is φ = 63797580.

The previous prime is 63899467. The next prime is 63899483. The reversal of 63899477 is 77499836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63899477 - 2¹⁸ = 63637333 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 (63899417) 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, 50003 + ... + 51264.

It is an arithmetic number, because the mean of its divisors is an integer number (16000344).

Almost surely, 2^63899477 is an apocalyptic number.

It is an amenable number.

63899477 is a deficient number, since it is larger than the sum of its proper divisors (101899).

63899477 is a wasteful number, since it uses less digits than its factorization.

63899477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101898.

The product of its digits is 2286144, while the sum is 53.

The square root of 63899477 is about 7993.7148435505. The cubic root of 63899477 is about 399.7904673427.

The spelling of 63899477 in words is "sixty-three million, eight hundred ninety-nine thousand, four hundred seventy-seven".