213349987 has 2 divisors, whose sum is σ = 213349988. Its totient is φ = 213349986.

The previous prime is 213349979. The next prime is 213350003. The reversal of 213349987 is 789943312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213349987 - 2³ = 213349979 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (213349387) 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 as a sum of consecutive naturals, namely, 106674993 + 106674994.

It is an arithmetic number, because the mean of its divisors is an integer number (106674994).

Almost surely, 2^213349987 is an apocalyptic number.

213349987 is a deficient number, since it is larger than the sum of its proper divisors (1).

213349987 is an equidigital number, since it uses as much as digits as its factorization.

213349987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 213349987 is about 14606.5049549850. The cubic root of 213349987 is about 597.5361807657.

The spelling of 213349987 in words is "two hundred thirteen million, three hundred forty-nine thousand, nine hundred eighty-seven".