191872985 has 16 divisors (see below), whose sum is σ = 235224000. Its totient is φ = 150196800.

The previous prime is 191872951. The next prime is 191872987. The reversal of 191872985 is 589278191.

It is not a de Polignac number, because 191872985 - 2¹⁴ = 191856601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191872987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131510 + ... + 132960.

It is an arithmetic number, because the mean of its divisors is an integer number (14701500).

Almost surely, 2^191872985 is an apocalyptic number.

It is an amenable number.

191872985 is a deficient number, since it is larger than the sum of its proper divisors (43351015).

191872985 is a wasteful number, since it uses less digits than its factorization.

191872985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008.

The product of its digits is 362880, while the sum is 50.

The square root of 191872985 is about 13851.8224432744. The cubic root of 191872985 is about 576.7725866375.

The spelling of 191872985 in words is "one hundred ninety-one million, eight hundred seventy-two thousand, nine hundred eighty-five".