164969557 has 2 divisors, whose sum is σ = 164969558. Its totient is φ = 164969556.

The previous prime is 164969551. The next prime is 164969587. The reversal of 164969557 is 755969461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141871921 + 23097636 = 11911^2 + 4806^2 .

It is a cyclic number.

It is not a de Polignac number, because 164969557 - 2¹⁵ = 164936789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164969551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82484778 + 82484779.

It is an arithmetic number, because the mean of its divisors is an integer number (82484779).

Almost surely, 2^164969557 is an apocalyptic number.

It is an amenable number.

164969557 is a deficient number, since it is larger than the sum of its proper divisors (1).

164969557 is an equidigital number, since it uses as much as digits as its factorization.

164969557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 52.

The square root of 164969557 is about 12844.0475318336. The cubic root of 164969557 is about 548.4469210542.

The spelling of 164969557 in words is "one hundred sixty-four million, nine hundred sixty-nine thousand, five hundred fifty-seven".