167995985 has 8 divisors (see below), whose sum is σ = 208546920. Its totient is φ = 129762304.

The previous prime is 167995963. The next prime is 167995991. The reversal of 167995985 is 589599761.

It can be written as a sum of positive squares in 4 ways, for example, as 59336209 + 108659776 = 7703^2 + 10424^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 167995985 - 2¹⁰ = 167994961 is a prime.

It is a super-2 number, since 2×167995985² = 56445301952240450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579152 + ... + 579441.

It is an arithmetic number, because the mean of its divisors is an integer number (26068365).

Almost surely, 2^167995985 is an apocalyptic number.

It is an amenable number.

167995985 is a deficient number, since it is larger than the sum of its proper divisors (40550935).

167995985 is a wasteful number, since it uses less digits than its factorization.

167995985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158627.

The product of its digits is 6123600, while the sum is 59.

The square root of 167995985 is about 12961.3265139028. The cubic root of 167995985 is about 551.7804395743.

The spelling of 167995985 in words is "one hundred sixty-seven million, nine hundred ninety-five thousand, nine hundred eighty-five".