168987051 has 6 divisors (see below), whose sum is σ = 244092420. Its totient is φ = 112658028.

The previous prime is 168987047. The next prime is 168987061. The reversal of 168987051 is 150789861.

It is not a de Polignac number, because 168987051 - 2² = 168987047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168986988 and 168987006.

It is not an unprimeable number, because it can be changed into a prime (168987011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9388161 + ... + 9388178.

It is an arithmetic number, because the mean of its divisors is an integer number (40682070).

Almost surely, 2^168987051 is an apocalyptic number.

168987051 is a deficient number, since it is larger than the sum of its proper divisors (75105369).

168987051 is a wasteful number, since it uses less digits than its factorization.

168987051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18776345 (or 18776342 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 168987051 is about 12999.5019519980. The cubic root of 168987051 is about 552.8633602764.

The spelling of 168987051 in words is "one hundred sixty-eight million, nine hundred eighty-seven thousand, fifty-one".