168720867 has 24 divisors (see below), whose sum is σ = 290768400. Its totient is φ = 96411168.

The previous prime is 168720791. The next prime is 168720899. The reversal of 168720867 is 768027861.

It is not a de Polignac number, because 168720867 - 2⁸ = 168720611 is a prime.

It is a super-2 number, since 2×168720867² = 56933461922463378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168720067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62442 + ... + 65087.

It is an arithmetic number, because the mean of its divisors is an integer number (12115350).

Almost surely, 2^168720867 is an apocalyptic number.

168720867 is a deficient number, since it is larger than the sum of its proper divisors (122047533).

168720867 is a wasteful number, since it uses less digits than its factorization.

168720867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127552 (or 127539 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 168720867 is about 12989.2596786730. The cubic root of 168720867 is about 552.5729224060.

The spelling of 168720867 in words is "one hundred sixty-eight million, seven hundred twenty thousand, eight hundred sixty-seven".