167987985 has 16 divisors (see below), whose sum is σ = 293215680. Its totient is φ = 81448640.

The previous prime is 167987969. The next prime is 167988019. The reversal of 167987985 is 589789761.

It is not a de Polignac number, because 167987985 - 2⁴ = 167987969 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508890 + ... + 509219.

It is an arithmetic number, because the mean of its divisors is an integer number (18325980).

Almost surely, 2^167987985 is an apocalyptic number.

167987985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

167987985 is a deficient number, since it is larger than the sum of its proper divisors (125227695).

167987985 is a wasteful number, since it uses less digits than its factorization.

167987985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018128.

The product of its digits is 7620480, while the sum is 60.

The square root of 167987985 is about 12961.0178998410. The cubic root of 167987985 is about 551.7716808063.

The spelling of 167987985 in words is "one hundred sixty-seven million, nine hundred eighty-seven thousand, nine hundred eighty-five".