213093697 has 2 divisors, whose sum is σ = 213093698. Its totient is φ = 213093696.

The previous prime is 213093547. The next prime is 213093703. The reversal of 213093697 is 796390312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172948801 + 40144896 = 13151^2 + 6336^2 .

It is a cyclic number.

It is not a de Polignac number, because 213093697 - 2¹⁵ = 213060929 is a prime.

It is a super-2 number, since 2×213093697² = 90817847402255618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213097697) 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, 106546848 + 106546849.

It is an arithmetic number, because the mean of its divisors is an integer number (106546849).

Almost surely, 2^213093697 is an apocalyptic number.

It is an amenable number.

213093697 is a deficient number, since it is larger than the sum of its proper divisors (1).

213093697 is an equidigital number, since it uses as much as digits as its factorization.

213093697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 213093697 is about 14597.7291727172. The cubic root of 213093697 is about 597.2968183414.

The spelling of 213093697 in words is "two hundred thirteen million, ninety-three thousand, six hundred ninety-seven".