213967361 has 2 divisors, whose sum is σ = 213967362. Its totient is φ = 213967360.

The previous prime is 213967357. The next prime is 213967393. The reversal of 213967361 is 163769312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144744961 + 69222400 = 12031^2 + 8320^2 .

It is a cyclic number.

It is not a de Polignac number, because 213967361 - 2² = 213967357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (213967331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106983680 + 106983681.

It is an arithmetic number, because the mean of its divisors is an integer number (106983681).

Almost surely, 2^213967361 is an apocalyptic number.

It is an amenable number.

213967361 is a deficient number, since it is larger than the sum of its proper divisors (1).

213967361 is an equidigital number, since it uses as much as digits as its factorization.

213967361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 213967361 is about 14627.6232177343. The cubic root of 213967361 is about 598.1119921271. Note that the first 3 decimals are identical.

The spelling of 213967361 in words is "two hundred thirteen million, nine hundred sixty-seven thousand, three hundred sixty-one".