164474491 has 2 divisors, whose sum is σ = 164474492. Its totient is φ = 164474490.

The previous prime is 164474419. The next prime is 164474503. The reversal of 164474491 is 194474461.

Together with previous prime (164474419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164474491 - 2⁷ = 164474363 is a prime.

It is not a weakly prime, because it can be changed into another prime (164471491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82237245 + 82237246.

It is an arithmetic number, because the mean of its divisors is an integer number (82237246).

Almost surely, 2^164474491 is an apocalyptic number.

164474491 is a deficient number, since it is larger than the sum of its proper divisors (1).

164474491 is an equidigital number, since it uses as much as digits as its factorization.

164474491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 164474491 is about 12824.7608554702. The cubic root of 164474491 is about 547.8977500721.

The spelling of 164474491 in words is "one hundred sixty-four million, four hundred seventy-four thousand, four hundred ninety-one".