171940906 has 8 divisors (see below), whose sum is σ = 259880544. Its totient is φ = 85314060.

The previous prime is 171940903. The next prime is 171940919. The reversal of 171940906 is 609049171.

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

It is a super-2 number, since 2×171940906² = 59127350312201672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (171940903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327870 + ... + 328393.

It is an arithmetic number, because the mean of its divisors is an integer number (32485068).

Almost surely, 2^171940906 is an apocalyptic number.

171940906 is a deficient number, since it is larger than the sum of its proper divisors (87939638).

171940906 is a wasteful number, since it uses less digits than its factorization.

171940906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656396.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 171940906 is about 13112.6239174316. The cubic root of 171940906 is about 556.0660795641.

The spelling of 171940906 in words is "one hundred seventy-one million, nine hundred forty thousand, nine hundred six".