213398797 has 2 divisors, whose sum is σ = 213398798. Its totient is φ = 213398796.

The previous prime is 213398743. The next prime is 213398821. The reversal of 213398797 is 797893312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187936681 + 25462116 = 13709^2 + 5046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213398797 is a prime.

It is a super-2 number, since 2×213398797² = 91078093122094418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213398797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213398707) 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, 106699398 + 106699399.

It is an arithmetic number, because the mean of its divisors is an integer number (106699399).

Almost surely, 2^213398797 is an apocalyptic number.

It is an amenable number.

213398797 is a deficient number, since it is larger than the sum of its proper divisors (1).

213398797 is an equidigital number, since it uses as much as digits as its factorization.

213398797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 213398797 is about 14608.1756903455. The cubic root of 213398797 is about 597.5817452042.

The spelling of 213398797 in words is "two hundred thirteen million, three hundred ninety-eight thousand, seven hundred ninety-seven".