67145849 has 2 divisors, whose sum is σ = 67145850. Its totient is φ = 67145848.

The previous prime is 67145839. The next prime is 67145851. The reversal of 67145849 is 94854176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48930025 + 18215824 = 6995^2 + 4268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67145849 is a prime.

Together with 67145851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67145839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33572924 + 33572925.

It is an arithmetic number, because the mean of its divisors is an integer number (33572925).

Almost surely, 2^67145849 is an apocalyptic number.

It is an amenable number.

67145849 is a deficient number, since it is larger than the sum of its proper divisors (1).

67145849 is an equidigital number, since it uses as much as digits as its factorization.

67145849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 67145849 is about 8194.2570743174. The cubic root of 67145849 is about 406.4493092547.

The spelling of 67145849 in words is "sixty-seven million, one hundred forty-five thousand, eight hundred forty-nine".