83663887 has 8 divisors (see below), whose sum is σ = 84427616. Its totient is φ = 82903392.

The previous prime is 83663863. The next prime is 83663911. The reversal of 83663887 is 78836638.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (83663863) and next prime (83663911).

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 83663887 - 2⁷ = 83663759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83663887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83663287) 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, 113773 + ... + 114505.

It is an arithmetic number, because the mean of its divisors is an integer number (10553452).

Almost surely, 2^83663887 is an apocalyptic number.

83663887 is a deficient number, since it is larger than the sum of its proper divisors (763729).

83663887 is a wasteful number, since it uses less digits than its factorization.

83663887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617.

The product of its digits is 1161216, while the sum is 49.

The square root of 83663887 is about 9146.7965430527. The cubic root of 83663887 is about 437.3670008788.

The spelling of 83663887 in words is "eighty-three million, six hundred sixty-three thousand, eight hundred eighty-seven".