84140249 has 2 divisors, whose sum is σ = 84140250. Its totient is φ = 84140248.

The previous prime is 84140239. The next prime is 84140263. The reversal of 84140249 is 94204148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68773849 + 15366400 = 8293^2 + 3920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84140249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84140219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42070124 + 42070125.

It is an arithmetic number, because the mean of its divisors is an integer number (42070125).

Almost surely, 2^84140249 is an apocalyptic number.

It is an amenable number.

84140249 is a deficient number, since it is larger than the sum of its proper divisors (1).

84140249 is an equidigital number, since it uses as much as digits as its factorization.

84140249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 84140249 is about 9172.7994091226. The cubic root of 84140249 is about 438.1955178200.

The spelling of 84140249 in words is "eighty-four million, one hundred forty thousand, two hundred forty-nine".