82987491 has 8 divisors (see below), whose sum is σ = 111224080. Its totient is φ = 55037952.

The previous prime is 82987469. The next prime is 82987493. The reversal of 82987491 is 19478928.

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

It is not a de Polignac number, because 82987491 - 2⁷ = 82987363 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 82987491.

It is not an unprimeable number, because it can be changed into a prime (82987493) 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, 71086 + ... + 72243.

It is an arithmetic number, because the mean of its divisors is an integer number (13903010).

Almost surely, 2^82987491 is an apocalyptic number.

82987491 is a deficient number, since it is larger than the sum of its proper divisors (28236589).

82987491 is a wasteful number, since it uses less digits than its factorization.

82987491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143525.

The product of its digits is 290304, while the sum is 48.

The square root of 82987491 is about 9109.7470327117. The cubic root of 82987491 is about 436.1851523329.

The spelling of 82987491 in words is "eighty-two million, nine hundred eighty-seven thousand, four hundred ninety-one".