212913923 has 2 divisors, whose sum is σ = 212913924. Its totient is φ = 212913922.

The previous prime is 212913893. The next prime is 212913929. The reversal of 212913923 is 329319212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212913923 - 2¹⁴ = 212897539 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212913923.

It is not a weakly prime, because it can be changed into another prime (212913929) 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, 106456961 + 106456962.

It is an arithmetic number, because the mean of its divisors is an integer number (106456962).

Almost surely, 2^212913923 is an apocalyptic number.

212913923 is a deficient number, since it is larger than the sum of its proper divisors (1).

212913923 is an equidigital number, since it uses as much as digits as its factorization.

212913923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 32.

The square root of 212913923 is about 14591.5702719070. The cubic root of 212913923 is about 597.1288035978.

The spelling of 212913923 in words is "two hundred twelve million, nine hundred thirteen thousand, nine hundred twenty-three".