172643812 has 12 divisors (see below), whose sum is σ = 329592816. Its totient is φ = 78474440.

The previous prime is 172643797. The next prime is 172643827. The reversal of 172643812 is 218346271.

It is an interprime number because it is at equal distance from previous prime (172643797) and next prime (172643827).

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, 1961818 + ... + 1961905.

It is an arithmetic number, because the mean of its divisors is an integer number (27466068).

Almost surely, 2^172643812 is an apocalyptic number.

It is an amenable number.

172643812 is a deficient number, since it is larger than the sum of its proper divisors (156949004).

172643812 is a wasteful number, since it uses less digits than its factorization.

172643812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923738 (or 3923736 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 172643812 is about 13139.3992252310. The cubic root of 172643812 is about 556.8227945222.

The spelling of 172643812 in words is "one hundred seventy-two million, six hundred forty-three thousand, eight hundred twelve".