84131893 has 2 divisors, whose sum is σ = 84131894. Its totient is φ = 84131892.

The previous prime is 84131881. The next prime is 84131897. The reversal of 84131893 is 39813148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83503044 + 628849 = 9138^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 84131893 - 2⁹ = 84131381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84131897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42065946 + 42065947.

It is an arithmetic number, because the mean of its divisors is an integer number (42065947).

Almost surely, 2^84131893 is an apocalyptic number.

It is an amenable number.

84131893 is a deficient number, since it is larger than the sum of its proper divisors (1).

84131893 is an equidigital number, since it uses as much as digits as its factorization.

84131893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 84131893 is about 9172.3439207217. The cubic root of 84131893 is about 438.1810115521.

The spelling of 84131893 in words is "eighty-four million, one hundred thirty-one thousand, eight hundred ninety-three".