67138349 has 2 divisors, whose sum is σ = 67138350. Its totient is φ = 67138348.

The previous prime is 67138303. The next prime is 67138363. The reversal of 67138349 is 94383176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47513449 + 19624900 = 6893^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 67138349 - 2¹² = 67134253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67138399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33569174 + 33569175.

It is an arithmetic number, because the mean of its divisors is an integer number (33569175).

Almost surely, 2^67138349 is an apocalyptic number.

It is an amenable number.

67138349 is a deficient number, since it is larger than the sum of its proper divisors (1).

67138349 is an equidigital number, since it uses as much as digits as its factorization.

67138349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 67138349 is about 8193.7994239547. The cubic root of 67138349 is about 406.4341756146.

The spelling of 67138349 in words is "sixty-seven million, one hundred thirty-eight thousand, three hundred forty-nine".