164240287 has 2 divisors, whose sum is σ = 164240288. Its totient is φ = 164240286.

The previous prime is 164240273. The next prime is 164240347. The reversal of 164240287 is 782042461.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (782042461) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164240287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164240257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82120143 + 82120144.

It is an arithmetic number, because the mean of its divisors is an integer number (82120144).

Almost surely, 2^164240287 is an apocalyptic number.

164240287 is a deficient number, since it is larger than the sum of its proper divisors (1).

164240287 is an equidigital number, since it uses as much as digits as its factorization.

164240287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 164240287 is about 12815.6266721530. The cubic root of 164240287 is about 547.6375662603.

The spelling of 164240287 in words is "one hundred sixty-four million, two hundred forty thousand, two hundred eighty-seven".