84155243 has 2 divisors, whose sum is σ = 84155244. Its totient is φ = 84155242.

The previous prime is 84155233. The next prime is 84155249. The reversal of 84155243 is 34255148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84155243 - 2²² = 79960939 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (84155249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42077621 + 42077622.

It is an arithmetic number, because the mean of its divisors is an integer number (42077622).

Almost surely, 2^84155243 is an apocalyptic number.

84155243 is a deficient number, since it is larger than the sum of its proper divisors (1).

84155243 is an equidigital number, since it uses as much as digits as its factorization.

84155243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 32.

The square root of 84155243 is about 9173.6166804592. The cubic root of 84155243 is about 438.2215454482.

The spelling of 84155243 in words is "eighty-four million, one hundred fifty-five thousand, two hundred forty-three".