97855211 has 2 divisors, whose sum is σ = 97855212. Its totient is φ = 97855210.

The previous prime is 97855207. The next prime is 97855223. The reversal of 97855211 is 11255879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97855211 - 2² = 97855207 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97855231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48927605 + 48927606.

It is an arithmetic number, because the mean of its divisors is an integer number (48927606).

Almost surely, 2^97855211 is an apocalyptic number.

97855211 is a deficient number, since it is larger than the sum of its proper divisors (1).

97855211 is an equidigital number, since it uses as much as digits as its factorization.

97855211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 38.

The square root of 97855211 is about 9892.1792846673. The cubic root of 97855211 is about 460.8164627159.

The spelling of 97855211 in words is "ninety-seven million, eight hundred fifty-five thousand, two hundred eleven".