1672172187 has 12 divisors (see below), whose sum is σ = 2593573416. Its totient is φ = 955526880.

The previous prime is 1672172153. The next prime is 1672172287. The reversal of 1672172187 is 7812712761.

It is not a de Polignac number, because 1672172187 - 2⁶ = 1672172123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1672172107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5687514 + ... + 5687807.

It is an arithmetic number, because the mean of its divisors is an integer number (216131118).

Almost surely, 2^1672172187 is an apocalyptic number.

1672172187 is a deficient number, since it is larger than the sum of its proper divisors (921401229).

1672172187 is a wasteful number, since it uses less digits than its factorization.

1672172187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11375338 (or 11375331 counting only the distinct ones).

The product of its digits is 65856, while the sum is 42.

The square root of 1672172187 is about 40892.2020316833. The cubic root of 1672172187 is about 1186.9351698615.

The spelling of 1672172187 in words is "one billion, six hundred seventy-two million, one hundred seventy-two thousand, one hundred eighty-seven".