67980491 has 2 divisors, whose sum is σ = 67980492. Its totient is φ = 67980490.

The previous prime is 67980481. The next prime is 67980541. The reversal of 67980491 is 19408976.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67980491 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (67980481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33990245 + 33990246.

It is an arithmetic number, because the mean of its divisors is an integer number (33990246).

Almost surely, 2^67980491 is an apocalyptic number.

67980491 is a deficient number, since it is larger than the sum of its proper divisors (1).

67980491 is an equidigital number, since it uses as much as digits as its factorization.

67980491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 67980491 is about 8245.0282595028. The cubic root of 67980491 is about 408.1264726301.

The spelling of 67980491 in words is "sixty-seven million, nine hundred eighty thousand, four hundred ninety-one".