83688687 has 8 divisors (see below), whose sum is σ = 123983280. Its totient is φ = 55792440.

The previous prime is 83688677. The next prime is 83688713. The reversal of 83688687 is 78688638.

It is a happy number.

It is not a de Polignac number, because 83688687 - 2²² = 79494383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83688607) 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, 1549764 + ... + 1549817.

It is an arithmetic number, because the mean of its divisors is an integer number (15497910).

Almost surely, 2^83688687 is an apocalyptic number.

83688687 is a deficient number, since it is larger than the sum of its proper divisors (40294593).

83688687 is a wasteful number, since it uses less digits than its factorization.

83688687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099590 (or 3099584 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 83688687 is about 9148.1521084862. The cubic root of 83688687 is about 437.4102119959.

The spelling of 83688687 in words is "eighty-three million, six hundred eighty-eight thousand, six hundred eighty-seven".