84205157 has 2 divisors, whose sum is σ = 84205158. Its totient is φ = 84205156.

The previous prime is 84205151. The next prime is 84205211. The reversal of 84205157 is 75150248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74632321 + 9572836 = 8639^2 + 3094^2 .

It is a cyclic number.

It is not a de Polignac number, because 84205157 - 2⁴ = 84205141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84205151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42102578 + 42102579.

It is an arithmetic number, because the mean of its divisors is an integer number (42102579).

Almost surely, 2^84205157 is an apocalyptic number.

It is an amenable number.

84205157 is a deficient number, since it is larger than the sum of its proper divisors (1).

84205157 is an equidigital number, since it uses as much as digits as its factorization.

84205157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 84205157 is about 9176.3367963474. The cubic root of 84205157 is about 438.3081673720.

The spelling of 84205157 in words is "eighty-four million, two hundred five thousand, one hundred fifty-seven".