213567797 has 2 divisors, whose sum is σ = 213567798. Its totient is φ = 213567796.

The previous prime is 213567791. The next prime is 213567829. The reversal of 213567797 is 797765312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157527601 + 56040196 = 12551^2 + 7486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213567797 is a prime.

It is a super-2 number, since 2×213567797² = 91222407830866418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213567791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106783898 + 106783899.

It is an arithmetic number, because the mean of its divisors is an integer number (106783899).

Almost surely, 2^213567797 is an apocalyptic number.

It is an amenable number.

213567797 is a deficient number, since it is larger than the sum of its proper divisors (1).

213567797 is an equidigital number, since it uses as much as digits as its factorization.

213567797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 47.

The square root of 213567797 is about 14613.9589776350. The cubic root of 213567797 is about 597.7394541015.

The spelling of 213567797 in words is "two hundred thirteen million, five hundred sixty-seven thousand, seven hundred ninety-seven".