163901813 has 2 divisors, whose sum is σ = 163901814. Its totient is φ = 163901812.

The previous prime is 163901807. The next prime is 163901819. The reversal of 163901813 is 318109361.

It is a balanced prime because it is at equal distance from previous prime (163901807) and next prime (163901819).

It can be written as a sum of positive squares in only one way, i.e., 163891204 + 10609 = 12802^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 163901813 - 2²⁴ = 147124597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163901813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163901819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81950906 + 81950907.

It is an arithmetic number, because the mean of its divisors is an integer number (81950907).

Almost surely, 2^163901813 is an apocalyptic number.

It is an amenable number.

163901813 is a deficient number, since it is larger than the sum of its proper divisors (1).

163901813 is an equidigital number, since it uses as much as digits as its factorization.

163901813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 163901813 is about 12802.4143426152. The cubic root of 163901813 is about 547.2611085703.

The spelling of 163901813 in words is "one hundred sixty-three million, nine hundred one thousand, eight hundred thirteen".