63671889 has 8 divisors (see below), whose sum is σ = 88587072. Its totient is φ = 40602320.

The previous prime is 63671879. The next prime is 63671891. The reversal of 63671889 is 98817636.

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

It is a cyclic number.

It is not a de Polignac number, because 63671889 - 2⁷ = 63671761 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63671809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461322 + ... + 461459.

It is an arithmetic number, because the mean of its divisors is an integer number (11073384).

Almost surely, 2^63671889 is an apocalyptic number.

63671889 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

63671889 is a deficient number, since it is larger than the sum of its proper divisors (24915183).

63671889 is a wasteful number, since it uses less digits than its factorization.

63671889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922807.

The product of its digits is 435456, while the sum is 48.

The square root of 63671889 is about 7979.4667115040. The cubic root of 63671889 is about 399.3152639268.

It can be divided in two parts, 6367 and 1889, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 63671889 in words is "sixty-three million, six hundred seventy-one thousand, eight hundred eighty-nine".