164738677 has 2 divisors, whose sum is σ = 164738678. Its totient is φ = 164738676.

The previous prime is 164738669. The next prime is 164738711. The reversal of 164738677 is 776837461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152621316 + 12117361 = 12354^2 + 3481^2 .

It is an emirp because it is prime and its reverse (776837461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164738677 - 2³ = 164738669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164738677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164738617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82369338 + 82369339.

It is an arithmetic number, because the mean of its divisors is an integer number (82369339).

Almost surely, 2^164738677 is an apocalyptic number.

It is an amenable number.

164738677 is a deficient number, since it is larger than the sum of its proper divisors (1).

164738677 is an equidigital number, since it uses as much as digits as its factorization.

164738677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 164738677 is about 12835.0565639579. The cubic root of 164738677 is about 548.1909454559.

The spelling of 164738677 in words is "one hundred sixty-four million, seven hundred thirty-eight thousand, six hundred seventy-seven".