163406885 has 4 divisors (see below), whose sum is σ = 196088268. Its totient is φ = 130725504.

The previous prime is 163406863. The next prime is 163406891. The reversal of 163406885 is 588604361.

163406885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114532804 + 48874081 = 10702^2 + 6991^2 .

It is a cyclic number.

It is not a de Polignac number, because 163406885 - 2¹⁴ = 163390501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16340684 + ... + 16340693.

It is an arithmetic number, because the mean of its divisors is an integer number (49022067).

Almost surely, 2^163406885 is an apocalyptic number.

It is an amenable number.

163406885 is a deficient number, since it is larger than the sum of its proper divisors (32681383).

163406885 is an equidigital number, since it uses as much as digits as its factorization.

163406885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32681382.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 163406885 is about 12783.0702493572. The cubic root of 163406885 is about 546.7097054075.

The spelling of 163406885 in words is "one hundred sixty-three million, four hundred six thousand, eight hundred eighty-five".