163072906 has 8 divisors (see below), whose sum is σ = 247705920. Its totient is φ = 80504268.

The previous prime is 163072859. The next prime is 163072907. The reversal of 163072906 is 609270361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (163072907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515896 + ... + 516211.

It is an arithmetic number, because the mean of its divisors is an integer number (30963240).

Almost surely, 2^163072906 is an apocalyptic number.

163072906 is a deficient number, since it is larger than the sum of its proper divisors (84633014).

163072906 is a wasteful number, since it uses less digits than its factorization.

163072906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032188.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 163072906 is about 12770.0002349256. Note that the first 3 decimals coincide. The cubic root of 163072906 is about 546.3369873357.

The spelling of 163072906 in words is "one hundred sixty-three million, seventy-two thousand, nine hundred six".