82971087 has 4 divisors (see below), whose sum is σ = 110628120. Its totient is φ = 55314056.

The previous prime is 82971071. The next prime is 82971113. The reversal of 82971087 is 78017928.

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 82971087 - 2⁴ = 82971071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82971047) 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, 13828512 + ... + 13828517.

It is an arithmetic number, because the mean of its divisors is an integer number (27657030).

Almost surely, 2^82971087 is an apocalyptic number.

82971087 is a deficient number, since it is larger than the sum of its proper divisors (27657033).

82971087 is a wasteful number, since it uses less digits than its factorization.

82971087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27657032.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 82971087 is about 9108.8466339049. The cubic root of 82971087 is about 436.1564104399.

The spelling of 82971087 in words is "eighty-two million, nine hundred seventy-one thousand, eighty-seven".