84198427 has 2 divisors, whose sum is σ = 84198428. Its totient is φ = 84198426.

The previous prime is 84198383. The next prime is 84198451. The reversal of 84198427 is 72489148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84198427 - 2⁷ = 84198299 is a prime.

It is not a weakly prime, because it can be changed into another prime (84598427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42099213 + 42099214.

It is an arithmetic number, because the mean of its divisors is an integer number (42099214).

Almost surely, 2^84198427 is an apocalyptic number.

84198427 is a deficient number, since it is larger than the sum of its proper divisors (1).

84198427 is an equidigital number, since it uses as much as digits as its factorization.

84198427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 84198427 is about 9175.9700849556. The cubic root of 84198427 is about 438.2964899694.

The spelling of 84198427 in words is "eighty-four million, one hundred ninety-eight thousand, four hundred twenty-seven".