163326649 has 2 divisors, whose sum is σ = 163326650. Its totient is φ = 163326648.

The previous prime is 163326613. The next prime is 163326661. The reversal of 163326649 is 946623361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153760000 + 9566649 = 12400^2 + 3093^2 .

It is an emirp because it is prime and its reverse (946623361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163326649 - 2¹⁷ = 163195577 is a prime.

It is not a weakly prime, because it can be changed into another prime (163326349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81663324 + 81663325.

It is an arithmetic number, because the mean of its divisors is an integer number (81663325).

Almost surely, 2^163326649 is an apocalyptic number.

It is an amenable number.

163326649 is a deficient number, since it is larger than the sum of its proper divisors (1).

163326649 is an equidigital number, since it uses as much as digits as its factorization.

163326649 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 163326649 is about 12779.9314943391. The cubic root of 163326649 is about 546.6202090122.

It can be divided in two parts, 1633 and 26649, that added together give a palindrome (28282).

The spelling of 163326649 in words is "one hundred sixty-three million, three hundred twenty-six thousand, six hundred forty-nine".