170616987 has 12 divisors (see below), whose sum is σ = 249823704. Its totient is φ = 112186080.

The previous prime is 170616983. The next prime is 170616989. The reversal of 170616987 is 789616071.

170616987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 170616987 - 2² = 170616983 is a prime.

It is a super-2 number, since 2×170616987² = 58220312505916338, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (170616983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129189 + ... + 130502.

It is an arithmetic number, because the mean of its divisors is an integer number (20818642).

Almost surely, 2^170616987 is an apocalyptic number.

170616987 is a deficient number, since it is larger than the sum of its proper divisors (79206717).

170616987 is a wasteful number, since it uses less digits than its factorization.

170616987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259770 (or 259767 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 170616987 is about 13062.0437527976. The cubic root of 170616987 is about 554.6351924495.

The spelling of 170616987 in words is "one hundred seventy million, six hundred sixteen thousand, nine hundred eighty-seven".