163902109 has 6 divisors (see below), whose sum is σ = 190661694. Its totient is φ = 140487480.

The previous prime is 163902097. The next prime is 163902127. The reversal of 163902109 is 901209361.

It can be written as a sum of positive squares in only one way, i.e., 162486009 + 1416100 = 12747^2 + 1190^2 .

It is not a de Polignac number, because 163902109 - 2⁹ = 163901597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163902199) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1672422 + ... + 1672519.

It is an arithmetic number, because the mean of its divisors is an integer number (31776949).

Almost surely, 2^163902109 is an apocalyptic number.

It is an amenable number.

163902109 is a deficient number, since it is larger than the sum of its proper divisors (26759585).

163902109 is an equidigital number, since it uses as much as digits as its factorization.

163902109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344955 (or 3344948 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 163902109 is about 12802.4259029295. The cubic root of 163902109 is about 547.2614380138.

The spelling of 163902109 in words is "one hundred sixty-three million, nine hundred two thousand, one hundred nine".