83876987 has 4 divisors (see below), whose sum is σ = 83903160. Its totient is φ = 83850816.

The previous prime is 83876983. The next prime is 83876993. The reversal of 83876987 is 78967838.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83876987 - 2² = 83876983 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (83876983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7478 + ... + 14955.

It is an arithmetic number, because the mean of its divisors is an integer number (20975790).

Almost surely, 2^83876987 is an apocalyptic number.

83876987 is the 7478-th pentagonal number.

83876987 is a deficient number, since it is larger than the sum of its proper divisors (26173).

83876987 is a wasteful number, since it uses less digits than its factorization.

83876987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26172.

The product of its digits is 4064256, while the sum is 56.

The square root of 83876987 is about 9158.4380218463. The cubic root of 83876987 is about 437.7380247089.

The spelling of 83876987 in words is "eighty-three million, eight hundred seventy-six thousand, nine hundred eighty-seven".