164609677 has 2 divisors, whose sum is σ = 164609678. Its totient is φ = 164609676.

The previous prime is 164609663. The next prime is 164609681. The reversal of 164609677 is 776906461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149352841 + 15256836 = 12221^2 + 3906^2 .

It is a cyclic number.

It is not a de Polignac number, because 164609677 - 2¹¹ = 164607629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164609617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82304838 + 82304839.

It is an arithmetic number, because the mean of its divisors is an integer number (82304839).

Almost surely, 2^164609677 is an apocalyptic number.

It is an amenable number.

164609677 is a deficient number, since it is larger than the sum of its proper divisors (1).

164609677 is an equidigital number, since it uses as much as digits as its factorization.

164609677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 164609677 is about 12830.0302805566. The cubic root of 164609677 is about 548.0478195879.

The spelling of 164609677 in words is "one hundred sixty-four million, six hundred nine thousand, six hundred seventy-seven".