321130087 has 2 divisors, whose sum is σ = 321130088. Its totient is φ = 321130086.

The previous prime is 321130057. The next prime is 321130093. The reversal of 321130087 is 780031123.

It is a strong prime.

It is an emirp because it is prime and its reverse (780031123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321130087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321130027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160565043 + 160565044.

It is an arithmetic number, because the mean of its divisors is an integer number (160565044).

Almost surely, 2^321130087 is an apocalyptic number.

321130087 is a deficient number, since it is larger than the sum of its proper divisors (1).

321130087 is an equidigital number, since it uses as much as digits as its factorization.

321130087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 321130087 is about 17920.1028735886. The cubic root of 321130087 is about 684.7946083556.

The spelling of 321130087 in words is "three hundred twenty-one million, one hundred thirty thousand, eighty-seven".