164247977 has 2 divisors, whose sum is σ = 164247978. Its totient is φ = 164247976.

The previous prime is 164247961. The next prime is 164248001. The reversal of 164247977 is 779742461.

It is a happy number.

164247977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150528361 + 13719616 = 12269^2 + 3704^2 .

It is an emirp because it is prime and its reverse (779742461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164247977 - 2⁴ = 164247961 is a prime.

It is not a weakly prime, because it can be changed into another prime (164247877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82123988 + 82123989.

It is an arithmetic number, because the mean of its divisors is an integer number (82123989).

Almost surely, 2^164247977 is an apocalyptic number.

It is an amenable number.

164247977 is a deficient number, since it is larger than the sum of its proper divisors (1).

164247977 is an equidigital number, since it uses as much as digits as its factorization.

164247977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 47.

The square root of 164247977 is about 12815.9266929863. The cubic root of 164247977 is about 547.6461132237.

The spelling of 164247977 in words is "one hundred sixty-four million, two hundred forty-seven thousand, nine hundred seventy-seven".