164609477 has 2 divisors, whose sum is σ = 164609478. Its totient is φ = 164609476.

The previous prime is 164609449. The next prime is 164609527. The reversal of 164609477 is 774906461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164198596 + 410881 = 12814^2 + 641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164609477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164609677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82304738 + 82304739.

It is an arithmetic number, because the mean of its divisors is an integer number (82304739).

Almost surely, 2^164609477 is an apocalyptic number.

It is an amenable number.

164609477 is a deficient number, since it is larger than the sum of its proper divisors (1).

164609477 is an equidigital number, since it uses as much as digits as its factorization.

164609477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 164609477 is about 12830.0224863404. The cubic root of 164609477 is about 548.0475976292.

The spelling of 164609477 in words is "one hundred sixty-four million, six hundred nine thousand, four hundred seventy-seven".