167928491 has 2 divisors, whose sum is σ = 167928492. Its totient is φ = 167928490.

The previous prime is 167928463. The next prime is 167928503. The reversal of 167928491 is 194829761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 167928491 - 2¹⁸ = 167666347 is a prime.

It is not a weakly prime, because it can be changed into another prime (167928421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83964245 + 83964246.

It is an arithmetic number, because the mean of its divisors is an integer number (83964246).

Almost surely, 2^167928491 is an apocalyptic number.

167928491 is a deficient number, since it is larger than the sum of its proper divisors (1).

167928491 is an equidigital number, since it uses as much as digits as its factorization.

167928491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 167928491 is about 12958.7225836500. The cubic root of 167928491 is about 551.7065353130.

The spelling of 167928491 in words is "one hundred sixty-seven million, nine hundred twenty-eight thousand, four hundred ninety-one".