63789091 has 4 divisors (see below), whose sum is σ = 63815472. Its totient is φ = 63762712.

The previous prime is 63789053. The next prime is 63789119. The reversal of 63789091 is 19098736.

63789091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-63789091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63783091) 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 3 ways as a sum of consecutive naturals, for example, 9151 + ... + 14536.

It is an arithmetic number, because the mean of its divisors is an integer number (15953868).

Almost surely, 2^63789091 is an apocalyptic number.

63789091 is a deficient number, since it is larger than the sum of its proper divisors (26381).

63789091 is a wasteful number, since it uses less digits than its factorization.

63789091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26380.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 63789091 is about 7986.8073095574. The cubic root of 63789091 is about 399.5601226972.

The spelling of 63789091 in words is "sixty-three million, seven hundred eighty-nine thousand, ninety-one".