196172685 has 24 divisors (see below), whose sum is σ = 352628640. Its totient is φ = 104624784.

The previous prime is 196172671. The next prime is 196172731. The reversal of 196172685 is 586271691.

196172685 is a `hidden beast` number, since 1 + 9 + 617 + 26 + 8 + 5 = 666.

It is not a de Polignac number, because 196172685 - 2⁵ = 196172653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 196172685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79515 + ... + 81944.

It is an arithmetic number, because the mean of its divisors is an integer number (14692860).

Almost surely, 2^196172685 is an apocalyptic number.

196172685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

196172685 is a deficient number, since it is larger than the sum of its proper divisors (156455955).

196172685 is an equidigital number, since it uses as much as digits as its factorization.

196172685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161479 (or 161467 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 196172685 is about 14006.1659636033. The cubic root of 196172685 is about 581.0491168460.

The spelling of 196172685 in words is "one hundred ninety-six million, one hundred seventy-two thousand, six hundred eighty-five".