612171994 has 32 divisors (see below), whose sum is σ = 1095811200. Its totient is φ = 256245696.

The previous prime is 612171983. The next prime is 612171997. The reversal of 612171994 is 499171216.

It is not an unprimeable number, because it can be changed into a prime (612171997) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 19122 + ... + 39874.

It is an arithmetic number, because the mean of its divisors is an integer number (34244100).

Almost surely, 2^612171994 is an apocalyptic number.

612171994 is a deficient number, since it is larger than the sum of its proper divisors (483639206).

612171994 is a wasteful number, since it uses less digits than its factorization.

612171994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20819 (or 20805 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 612171994 is about 24742.1097321954. The cubic root of 612171994 is about 849.0980023319.

The spelling of 612171994 in words is "six hundred twelve million, one hundred seventy-one thousand, nine hundred ninety-four".