164902489 has 2 divisors, whose sum is σ = 164902490. Its totient is φ = 164902488.

The previous prime is 164902487. The next prime is 164902537. The reversal of 164902489 is 984209461.

164902489 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., 127509264 + 37393225 = 11292^2 + 6115^2 .

It is an emirp because it is prime and its reverse (984209461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164902489 - 2¹ = 164902487 is a prime.

Together with 164902487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (164902487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82451244 + 82451245.

It is an arithmetic number, because the mean of its divisors is an integer number (82451245).

Almost surely, 2^164902489 is an apocalyptic number.

It is an amenable number.

164902489 is a deficient number, since it is larger than the sum of its proper divisors (1).

164902489 is an equidigital number, since it uses as much as digits as its factorization.

164902489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 164902489 is about 12841.4364071937. The cubic root of 164902489 is about 548.3725876951.

The spelling of 164902489 in words is "one hundred sixty-four million, nine hundred two thousand, four hundred eighty-nine".