164897851 has 2 divisors, whose sum is σ = 164897852. Its totient is φ = 164897850.

The previous prime is 164897839. The next prime is 164897867. The reversal of 164897851 is 158798461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164897851 - 2⁷ = 164897723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164897795 and 164897804.

It is not a weakly prime, because it can be changed into another prime (164897801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82448925 + 82448926.

It is an arithmetic number, because the mean of its divisors is an integer number (82448926).

Almost surely, 2^164897851 is an apocalyptic number.

164897851 is a deficient number, since it is larger than the sum of its proper divisors (1).

164897851 is an equidigital number, since it uses as much as digits as its factorization.

164897851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 49.

The square root of 164897851 is about 12841.2558186495. The cubic root of 164897851 is about 548.3674465237.

It can be divided in two parts, 1648 and 97851, that added together give a palindrome (99499).

The spelling of 164897851 in words is "one hundred sixty-four million, eight hundred ninety-seven thousand, eight hundred fifty-one".