84311897 has 2 divisors, whose sum is σ = 84311898. Its totient is φ = 84311896.

The previous prime is 84311893. The next prime is 84311917. The reversal of 84311897 is 79811348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72914521 + 11397376 = 8539^2 + 3376^2 .

It is a cyclic number.

It is not a de Polignac number, because 84311897 - 2² = 84311893 is a prime.

It is not a weakly prime, because it can be changed into another prime (84311893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42155948 + 42155949.

It is an arithmetic number, because the mean of its divisors is an integer number (42155949).

Almost surely, 2^84311897 is an apocalyptic number.

It is an amenable number.

84311897 is a deficient number, since it is larger than the sum of its proper divisors (1).

84311897 is an equidigital number, since it uses as much as digits as its factorization.

84311897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 84311897 is about 9182.1510007187. The cubic root of 84311897 is about 438.4932916599.

The spelling of 84311897 in words is "eighty-four million, three hundred eleven thousand, eight hundred ninety-seven".