213345397 has 2 divisors, whose sum is σ = 213345398. Its totient is φ = 213345396.

The previous prime is 213345329. The next prime is 213345439. The reversal of 213345397 is 793543312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199402641 + 13942756 = 14121^2 + 3734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213345397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213345697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106672698 + 106672699.

It is an arithmetic number, because the mean of its divisors is an integer number (106672699).

Almost surely, 2^213345397 is an apocalyptic number.

It is an amenable number.

213345397 is a deficient number, since it is larger than the sum of its proper divisors (1).

213345397 is an equidigital number, since it uses as much as digits as its factorization.

213345397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 213345397 is about 14606.3478323638. The cubic root of 213345397 is about 597.5318956147.

The spelling of 213345397 in words is "two hundred thirteen million, three hundred forty-five thousand, three hundred ninety-seven".