171994738 has 16 divisors (see below), whose sum is σ = 260850240. Its totient is φ = 85050000.

The previous prime is 171994733. The next prime is 171994741. The reversal of 171994738 is 837499171.

It is a junction number, because it is equal to n+sod(n) for n = 171994691 and 171994700.

It is not an unprimeable number, because it can be changed into a prime (171994733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74668 + ... + 76936.

It is an arithmetic number, because the mean of its divisors is an integer number (16303140).

Almost surely, 2^171994738 is an apocalyptic number.

171994738 is a deficient number, since it is larger than the sum of its proper divisors (88855502).

171994738 is a wasteful number, since it uses less digits than its factorization.

171994738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673.

The product of its digits is 381024, while the sum is 49.

The square root of 171994738 is about 13114.6764352004. The cubic root of 171994738 is about 556.1241053639.

The spelling of 171994738 in words is "one hundred seventy-one million, nine hundred ninety-four thousand, seven hundred thirty-eight".