67431373 has 2 divisors, whose sum is σ = 67431374. Its totient is φ = 67431372.

The previous prime is 67431311. The next prime is 67431379. The reversal of 67431373 is 37313476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62062884 + 5368489 = 7878^2 + 2317^2 .

It is a cyclic number.

It is not a de Polignac number, because 67431373 - 2²¹ = 65334221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67431379) 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, 33715686 + 33715687.

It is an arithmetic number, because the mean of its divisors is an integer number (33715687).

Almost surely, 2^67431373 is an apocalyptic number.

It is an amenable number.

67431373 is a deficient number, since it is larger than the sum of its proper divisors (1).

67431373 is an equidigital number, since it uses as much as digits as its factorization.

67431373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 34.

The square root of 67431373 is about 8211.6607942608. The cubic root of 67431373 is about 407.0246087823.

The spelling of 67431373 in words is "sixty-seven million, four hundred thirty-one thousand, three hundred seventy-three".