67145213 has 2 divisors, whose sum is σ = 67145214. Its totient is φ = 67145212.

The previous prime is 67145209. The next prime is 67145233. The reversal of 67145213 is 31254176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65983129 + 1162084 = 8123^2 + 1078^2 .

It is a cyclic number.

It is not a de Polignac number, because 67145213 - 2² = 67145209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67145233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33572606 + 33572607.

It is an arithmetic number, because the mean of its divisors is an integer number (33572607).

Almost surely, 2^67145213 is an apocalyptic number.

It is an amenable number.

67145213 is a deficient number, since it is larger than the sum of its proper divisors (1).

67145213 is an equidigital number, since it uses as much as digits as its factorization.

67145213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 67145213 is about 8194.2182665584. The cubic root of 67145213 is about 406.4480259657.

Adding to 67145213 its reverse (31254176), we get a palindrome (98399389).

The spelling of 67145213 in words is "sixty-seven million, one hundred forty-five thousand, two hundred thirteen".