67761493 has 2 divisors, whose sum is σ = 67761494. Its totient is φ = 67761492.

The previous prime is 67761457. The next prime is 67761497. The reversal of 67761493 is 39416776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64368529 + 3392964 = 8023^2 + 1842^2 .

It is a cyclic number.

It is not a de Polignac number, because 67761493 - 2²¹ = 65664341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67761497) 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, 33880746 + 33880747.

It is an arithmetic number, because the mean of its divisors is an integer number (33880747).

Almost surely, 2^67761493 is an apocalyptic number.

It is an amenable number.

67761493 is a deficient number, since it is larger than the sum of its proper divisors (1).

67761493 is an equidigital number, since it uses as much as digits as its factorization.

67761493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 67761493 is about 8231.7369370018. The cubic root of 67761493 is about 407.6877436674.

The spelling of 67761493 in words is "sixty-seven million, seven hundred sixty-one thousand, four hundred ninety-three".