83143987 has 8 divisors (see below), whose sum is σ = 85089600. Its totient is φ = 81205824.

The previous prime is 83143939. The next prime is 83143999. The reversal of 83143987 is 78934138.

It is a happy number.

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 83143987 - 2¹¹ = 83141939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83143927) 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, 25189 + ... + 28297.

It is an arithmetic number, because the mean of its divisors is an integer number (10636200).

Almost surely, 2^83143987 is an apocalyptic number.

83143987 is a deficient number, since it is larger than the sum of its proper divisors (1945613).

83143987 is a wasteful number, since it uses less digits than its factorization.

83143987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725.

The product of its digits is 145152, while the sum is 43.

The square root of 83143987 is about 9118.3324681654. The cubic root of 83143987 is about 436.4591629786.

The spelling of 83143987 in words is "eighty-three million, one hundred forty-three thousand, nine hundred eighty-seven".