164020771 has 2 divisors, whose sum is σ = 164020772. Its totient is φ = 164020770.

The previous prime is 164020733. The next prime is 164020789. The reversal of 164020771 is 177020461.

It is a strong prime.

It is an emirp because it is prime and its reverse (177020461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164020771 - 2¹⁷ = 163889699 is a prime.

It is not a weakly prime, because it can be changed into another prime (164023771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82010385 + 82010386.

It is an arithmetic number, because the mean of its divisors is an integer number (82010386).

Almost surely, 2^164020771 is an apocalyptic number.

164020771 is a deficient number, since it is larger than the sum of its proper divisors (1).

164020771 is an equidigital number, since it uses as much as digits as its factorization.

164020771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 164020771 is about 12807.0594204915. The cubic root of 164020771 is about 547.3934751017.

The spelling of 164020771 in words is "one hundred sixty-four million, twenty thousand, seven hundred seventy-one".