63503889 has 4 divisors (see below), whose sum is σ = 84671856. Its totient is φ = 42335924.

The previous prime is 63503879. The next prime is 63503893. The reversal of 63503889 is 98830536.

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 63503889 - 2¹⁷ = 63372817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63503889.

It is not an unprimeable number, because it can be changed into a prime (63503849) 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, 10583979 + ... + 10583984.

It is an arithmetic number, because the mean of its divisors is an integer number (21167964).

Almost surely, 2^63503889 is an apocalyptic number.

It is an amenable number.

63503889 is a deficient number, since it is larger than the sum of its proper divisors (21167967).

63503889 is a wasteful number, since it uses less digits than its factorization.

63503889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21167966.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 63503889 is about 7968.9327390812. The cubic root of 63503889 is about 398.9637532164.

The spelling of 63503889 in words is "sixty-three million, five hundred three thousand, eight hundred eighty-nine".