212116397 has 2 divisors, whose sum is σ = 212116398. Its totient is φ = 212116396.

The previous prime is 212116393. The next prime is 212116423. The reversal of 212116397 is 793611212.

212116397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127825636 + 84290761 = 11306^2 + 9181^2 .

It is a cyclic number.

It is not a de Polignac number, because 212116397 - 2² = 212116393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212116393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106058198 + 106058199.

It is an arithmetic number, because the mean of its divisors is an integer number (106058199).

Almost surely, 2^212116397 is an apocalyptic number.

It is an amenable number.

212116397 is a deficient number, since it is larger than the sum of its proper divisors (1).

212116397 is an equidigital number, since it uses as much as digits as its factorization.

212116397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 212116397 is about 14564.2163194591. The cubic root of 212116397 is about 596.3823022414.

The spelling of 212116397 in words is "two hundred twelve million, one hundred sixteen thousand, three hundred ninety-seven".