172681406 has 8 divisors (see below), whose sum is σ = 259582944. Its totient is φ = 86153760.

The previous prime is 172681403. The next prime is 172681429. The reversal of 172681406 is 604186271.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172681403) 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, 92315 + ... + 94166.

It is an arithmetic number, because the mean of its divisors is an integer number (32447868).

Almost surely, 2^172681406 is an apocalyptic number.

172681406 is a deficient number, since it is larger than the sum of its proper divisors (86901538).

172681406 is a wasteful number, since it uses less digits than its factorization.

172681406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186946.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 172681406 is about 13140.8297302720. The cubic root of 172681406 is about 556.8632085142.

The spelling of 172681406 in words is "one hundred seventy-two million, six hundred eighty-one thousand, four hundred six".