213102397 has 2 divisors, whose sum is σ = 213102398. Its totient is φ = 213102396.

The previous prime is 213102391. The next prime is 213102413. The reversal of 213102397 is 793201312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138556441 + 74545956 = 11771^2 + 8634^2 .

It is a cyclic number.

It is not a de Polignac number, because 213102397 - 2⁷ = 213102269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213102391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106551198 + 106551199.

It is an arithmetic number, because the mean of its divisors is an integer number (106551199).

Almost surely, 2^213102397 is an apocalyptic number.

It is an amenable number.

213102397 is a deficient number, since it is larger than the sum of its proper divisors (1).

213102397 is an equidigital number, since it uses as much as digits as its factorization.

213102397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 213102397 is about 14598.0271612297. The cubic root of 213102397 is about 597.3049468653.

The spelling of 213102397 in words is "two hundred thirteen million, one hundred two thousand, three hundred ninety-seven".