84145049 has 2 divisors, whose sum is σ = 84145050. Its totient is φ = 84145048.

The previous prime is 84145027. The next prime is 84145051. The reversal of 84145049 is 94054148.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 1607824 = 9085^2 + 1268^2 .

It is a cyclic number.

It is not a de Polignac number, because 84145049 - 2⁸ = 84144793 is a prime.

Together with 84145051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84195049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42072524 + 42072525.

It is an arithmetic number, because the mean of its divisors is an integer number (42072525).

Almost surely, 2^84145049 is an apocalyptic number.

It is an amenable number.

84145049 is a deficient number, since it is larger than the sum of its proper divisors (1).

84145049 is an equidigital number, since it uses as much as digits as its factorization.

84145049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 84145049 is about 9173.0610485268. The cubic root of 84145049 is about 438.2038503303.

Subtracting 84145049 from its reverse (94054148), we obtain a palindrome (9909099).

The spelling of 84145049 in words is "eighty-four million, one hundred forty-five thousand, forty-nine".