168908971 has 16 divisors (see below), whose sum is σ = 215728128. Its totient is φ = 128404800.

The previous prime is 168908951. The next prime is 168908981. The reversal of 168908971 is 179809861.

It is a cyclic number.

It is not a de Polignac number, because 168908971 - 2¹¹ = 168906923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168908951) 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, 23595 + ... + 29908.

It is an arithmetic number, because the mean of its divisors is an integer number (13483008).

Almost surely, 2^168908971 is an apocalyptic number.

168908971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

168908971 is a deficient number, since it is larger than the sum of its proper divisors (46819157).

168908971 is a wasteful number, since it uses less digits than its factorization.

168908971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53562.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 168908971 is about 12996.4984130342. The cubic root of 168908971 is about 552.7781974960.

The spelling of 168908971 in words is "one hundred sixty-eight million, nine hundred eight thousand, nine hundred seventy-one".