67131893 has 2 divisors, whose sum is σ = 67131894. Its totient is φ = 67131892.

The previous prime is 67131877. The next prime is 67131913. The reversal of 67131893 is 39813176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50794129 + 16337764 = 7127^2 + 4042^2 .

It is a cyclic number.

It is not a de Polignac number, because 67131893 - 2⁴ = 67131877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67131803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33565946 + 33565947.

It is an arithmetic number, because the mean of its divisors is an integer number (33565947).

Almost surely, 2^67131893 is an apocalyptic number.

It is an amenable number.

67131893 is a deficient number, since it is larger than the sum of its proper divisors (1).

67131893 is an equidigital number, since it uses as much as digits as its factorization.

67131893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 67131893 is about 8193.4054580498. The cubic root of 67131893 is about 406.4211476746.

The spelling of 67131893 in words is "sixty-seven million, one hundred thirty-one thousand, eight hundred ninety-three".