82631287 has 4 divisors (see below), whose sum is σ = 82760440. Its totient is φ = 82502136.

The previous prime is 82631281. The next prime is 82631303. The reversal of 82631287 is 78213628.

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 82631287 - 2³ = 82631279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82631281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63612 + ... + 64897.

It is an arithmetic number, because the mean of its divisors is an integer number (20690110).

Almost surely, 2^82631287 is an apocalyptic number.

82631287 is a deficient number, since it is larger than the sum of its proper divisors (129153).

82631287 is a wasteful number, since it uses less digits than its factorization.

82631287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129152.

The product of its digits is 32256, while the sum is 37.

The square root of 82631287 is about 9090.1753008399. The cubic root of 82631287 is about 435.5601837453.

The spelling of 82631287 in words is "eighty-two million, six hundred thirty-one thousand, two hundred eighty-seven".