164400277 has 2 divisors, whose sum is σ = 164400278. Its totient is φ = 164400276.

The previous prime is 164400263. The next prime is 164400281. The reversal of 164400277 is 772004461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152744881 + 11655396 = 12359^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 164400277 - 2¹¹ = 164398229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164400227) 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, 82200138 + 82200139.

It is an arithmetic number, because the mean of its divisors is an integer number (82200139).

Almost surely, 2^164400277 is an apocalyptic number.

It is an amenable number.

164400277 is a deficient number, since it is larger than the sum of its proper divisors (1).

164400277 is an equidigital number, since it uses as much as digits as its factorization.

164400277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 164400277 is about 12821.8671417232. The cubic root of 164400277 is about 547.8153303999.

The spelling of 164400277 in words is "one hundred sixty-four million, four hundred thousand, two hundred seventy-seven".