84121573 has 2 divisors, whose sum is σ = 84121574. Its totient is φ = 84121572.

The previous prime is 84121537. The next prime is 84121577. The reversal of 84121573 is 37512148.

Together with previous prime (84121537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83484769 + 636804 = 9137^2 + 798^2 .

It is a cyclic number.

It is not a de Polignac number, because 84121573 - 2⁹ = 84121061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84121577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42060786 + 42060787.

It is an arithmetic number, because the mean of its divisors is an integer number (42060787).

Almost surely, 2^84121573 is an apocalyptic number.

It is an amenable number.

84121573 is a deficient number, since it is larger than the sum of its proper divisors (1).

84121573 is an equidigital number, since it uses as much as digits as its factorization.

84121573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 84121573 is about 9171.7813427927. The cubic root of 84121573 is about 438.1630943954.

The spelling of 84121573 in words is "eighty-four million, one hundred twenty-one thousand, five hundred seventy-three".