213148939 has 2 divisors, whose sum is σ = 213148940. Its totient is φ = 213148938.

The previous prime is 213148919. The next prime is 213148951. The reversal of 213148939 is 939841312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213148939 - 2¹¹ = 213146891 is a prime.

It is not a weakly prime, because it can be changed into another prime (213148919) 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, 106574469 + 106574470.

It is an arithmetic number, because the mean of its divisors is an integer number (106574470).

Almost surely, 2^213148939 is an apocalyptic number.

213148939 is a deficient number, since it is larger than the sum of its proper divisors (1).

213148939 is an equidigital number, since it uses as much as digits as its factorization.

213148939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 213148939 is about 14599.6211937160. The cubic root of 213148939 is about 597.3484279079.

The spelling of 213148939 in words is "two hundred thirteen million, one hundred forty-eight thousand, nine hundred thirty-nine".