172191046 has 8 divisors (see below), whose sum is σ = 261924624. Its totient is φ = 84882840.

The previous prime is 172191031. The next prime is 172191073. The reversal of 172191046 is 640191271.

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

It is a junction number, because it is equal to n+sod(n) for n = 172190999 and 172191017.

It is a congruent number.

It is an unprimeable number.

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, 606165 + ... + 606448.

It is an arithmetic number, because the mean of its divisors is an integer number (32740578).

Almost surely, 2^172191046 is an apocalyptic number.

172191046 is a deficient number, since it is larger than the sum of its proper divisors (89733578).

172191046 is a wasteful number, since it uses less digits than its factorization.

172191046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212686.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 172191046 is about 13122.1585876715. The cubic root of 172191046 is about 556.3356042809.

The spelling of 172191046 in words is "one hundred seventy-two million, one hundred ninety-one thousand, forty-six".