67374537493 has 2 divisors, whose sum is σ = 67374537494. Its totient is φ = 67374537492.

The previous prime is 67374537473. The next prime is 67374537497. The reversal of 67374537493 is 39473547376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58002942244 + 9371595249 = 240838^2 + 96807^2 .

It is a cyclic number.

It is not a de Polignac number, because 67374537493 - 2⁹ = 67374536981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67374537497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33687268746 + 33687268747.

It is an arithmetic number, because the mean of its divisors is an integer number (33687268747).

Almost surely, 2^67374537493 is an apocalyptic number.

It is an amenable number.

67374537493 is a deficient number, since it is larger than the sum of its proper divisors (1).

67374537493 is an equidigital number, since it uses as much as digits as its factorization.

67374537493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 58.

The spelling of 67374537493 in words is "sixty-seven billion, three hundred seventy-four million, five hundred thirty-seven thousand, four hundred ninety-three".