163236649 has 2 divisors, whose sum is σ = 163236650. Its totient is φ = 163236648.

The previous prime is 163236641. The next prime is 163236659. The reversal of 163236649 is 946632361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113039424 + 50197225 = 10632^2 + 7085^2 .

It is an emirp because it is prime and its reverse (946632361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163236649 - 2³ = 163236641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163236641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81618324 + 81618325.

It is an arithmetic number, because the mean of its divisors is an integer number (81618325).

Almost surely, 2^163236649 is an apocalyptic number.

It is an amenable number.

163236649 is a deficient number, since it is larger than the sum of its proper divisors (1).

163236649 is an equidigital number, since it uses as much as digits as its factorization.

163236649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The square root of 163236649 is about 12776.4098634945. The cubic root of 163236649 is about 546.5197868251.

The spelling of 163236649 in words is "one hundred sixty-three million, two hundred thirty-six thousand, six hundred forty-nine".