84165427 has 2 divisors, whose sum is σ = 84165428. Its totient is φ = 84165426.

The previous prime is 84165397. The next prime is 84165439. The reversal of 84165427 is 72456148.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84165427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84165457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42082713 + 42082714.

It is an arithmetic number, because the mean of its divisors is an integer number (42082714).

Almost surely, 2^84165427 is an apocalyptic number.

84165427 is a deficient number, since it is larger than the sum of its proper divisors (1).

84165427 is an equidigital number, since it uses as much as digits as its factorization.

84165427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 84165427 is about 9174.1717337316. The cubic root of 84165427 is about 438.2392217808.

The spelling of 84165427 in words is "eighty-four million, one hundred sixty-five thousand, four hundred twenty-seven".