326638987 has 2 divisors, whose sum is σ = 326638988. Its totient is φ = 326638986.

The previous prime is 326638981. The next prime is 326638999. The reversal of 326638987 is 789836623.

It is a weak prime.

It is an emirp because it is prime and its reverse (789836623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326638987 - 2⁷ = 326638859 is a prime.

It is not a weakly prime, because it can be changed into another prime (326638981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163319493 + 163319494.

It is an arithmetic number, because the mean of its divisors is an integer number (163319494).

Almost surely, 2^326638987 is an apocalyptic number.

326638987 is a deficient number, since it is larger than the sum of its proper divisors (1).

326638987 is an equidigital number, since it uses as much as digits as its factorization.

326638987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 52.

The square root of 326638987 is about 18073.1565311652. The cubic root of 326638987 is about 688.6882499704.

The spelling of 326638987 in words is "three hundred twenty-six million, six hundred thirty-eight thousand, nine hundred eighty-seven".