212973913 has 2 divisors, whose sum is σ = 212973914. Its totient is φ = 212973912.

The previous prime is 212973853. The next prime is 212973947. The reversal of 212973913 is 319379212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206583129 + 6390784 = 14373^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 212973913 - 2⁹ = 212973401 is a prime.

It is not a weakly prime, because it can be changed into another prime (212973613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106486956 + 106486957.

It is an arithmetic number, because the mean of its divisors is an integer number (106486957).

Almost surely, 2^212973913 is an apocalyptic number.

It is an amenable number.

212973913 is a deficient number, since it is larger than the sum of its proper divisors (1).

212973913 is an equidigital number, since it uses as much as digits as its factorization.

212973913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 212973913 is about 14593.6257660665. The cubic root of 212973913 is about 597.1848800827.

The spelling of 212973913 in words is "two hundred twelve million, nine hundred seventy-three thousand, nine hundred thirteen".