67438291 has 2 divisors, whose sum is σ = 67438292. Its totient is φ = 67438290.

The previous prime is 67438249. The next prime is 67438331. The reversal of 67438291 is 19283476.

It is an a-pointer prime, because the next prime (67438331) can be obtained adding 67438291 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67438291 - 2⁹ = 67437779 is a prime.

It is not a weakly prime, because it can be changed into another prime (67430291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33719145 + 33719146.

It is an arithmetic number, because the mean of its divisors is an integer number (33719146).

Almost surely, 2^67438291 is an apocalyptic number.

67438291 is a deficient number, since it is larger than the sum of its proper divisors (1).

67438291 is an equidigital number, since it uses as much as digits as its factorization.

67438291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 67438291 is about 8212.0820137161. The cubic root of 67438291 is about 407.0385276247.

The spelling of 67438291 in words is "sixty-seven million, four hundred thirty-eight thousand, two hundred ninety-one".