67468139 has 2 divisors, whose sum is σ = 67468140. Its totient is φ = 67468138.

The previous prime is 67468117. The next prime is 67468147. The reversal of 67468139 is 93186476.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67468139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67468139.

It is not a weakly prime, because it can be changed into another prime (67468109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33734069 + 33734070.

It is an arithmetic number, because the mean of its divisors is an integer number (33734070).

Almost surely, 2^67468139 is an apocalyptic number.

67468139 is a deficient number, since it is larger than the sum of its proper divisors (1).

67468139 is an equidigital number, since it uses as much as digits as its factorization.

67468139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 67468139 is about 8213.8991350028. The cubic root of 67468139 is about 407.0985701407.

The spelling of 67468139 in words is "sixty-seven million, four hundred sixty-eight thousand, one hundred thirty-nine".