67917149 has 2 divisors, whose sum is σ = 67917150. Its totient is φ = 67917148.

The previous prime is 67917139. The next prime is 67917151. The reversal of 67917149 is 94171976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 1249924 = 8165^2 + 1118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67917149 is a prime.

It is a super-2 number, since 2×67917149² = 9225478256576402, which contains 22 as substring.

Together with 67917151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67917139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33958574 + 33958575.

It is an arithmetic number, because the mean of its divisors is an integer number (33958575).

Almost surely, 2^67917149 is an apocalyptic number.

It is an amenable number.

67917149 is a deficient number, since it is larger than the sum of its proper divisors (1).

67917149 is an equidigital number, since it uses as much as digits as its factorization.

67917149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 44.

The square root of 67917149 is about 8241.1861403563. The cubic root of 67917149 is about 407.9996736028. Note that the first 3 decimals are identical.

The spelling of 67917149 in words is "sixty-seven million, nine hundred seventeen thousand, one hundred forty-nine".