87281287 has 2 divisors, whose sum is σ = 87281288. Its totient is φ = 87281286.

The previous prime is 87281267. The next prime is 87281323. The reversal of 87281287 is 78218278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87281287 - 2¹¹ = 87279239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87281267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43640643 + 43640644.

It is an arithmetic number, because the mean of its divisors is an integer number (43640644).

Almost surely, 2^87281287 is an apocalyptic number.

87281287 is a deficient number, since it is larger than the sum of its proper divisors (1).

87281287 is an equidigital number, since it uses as much as digits as its factorization.

87281287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100352, while the sum is 43.

The square root of 87281287 is about 9342.4454507372. The cubic root of 87281287 is about 443.5817948223.

The spelling of 87281287 in words is "eighty-seven million, two hundred eighty-one thousand, two hundred eighty-seven".