168772091 has 8 divisors (see below), whose sum is σ = 181791744. Its totient is φ = 156225960.

The previous prime is 168772061. The next prime is 168772103. The reversal of 168772091 is 190277861.

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 168772091 - 2⁶ = 168772027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168772061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117641 + ... + 119066.

It is an arithmetic number, because the mean of its divisors is an integer number (22723968).

Almost surely, 2^168772091 is an apocalyptic number.

168772091 is a deficient number, since it is larger than the sum of its proper divisors (13019653).

168772091 is a wasteful number, since it uses less digits than its factorization.

168772091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236761.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 168772091 is about 12991.2313119273. The cubic root of 168772091 is about 552.6288375038.

The spelling of 168772091 in words is "one hundred sixty-eight million, seven hundred seventy-two thousand, ninety-one".