213898337 has 2 divisors, whose sum is σ = 213898338. Its totient is φ = 213898336.

The previous prime is 213898331. The next prime is 213898339. The reversal of 213898337 is 733898312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171505216 + 42393121 = 13096^2 + 6511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213898337 is a prime.

Together with 213898339, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213898331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106949168 + 106949169.

It is an arithmetic number, because the mean of its divisors is an integer number (106949169).

Almost surely, 2^213898337 is an apocalyptic number.

It is an amenable number.

213898337 is a deficient number, since it is larger than the sum of its proper divisors (1).

213898337 is an equidigital number, since it uses as much as digits as its factorization.

213898337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 213898337 is about 14625.2636557431. The cubic root of 213898337 is about 598.0476699768.

The spelling of 213898337 in words is "two hundred thirteen million, eight hundred ninety-eight thousand, three hundred thirty-seven".