168520387 has 8 divisors (see below), whose sum is σ = 192807776. Its totient is φ = 144286272.

The previous prime is 168520361. The next prime is 168520409. The reversal of 168520387 is 783025861.

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 168520387 - 2⁷ = 168520259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168520327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6288 + ... + 19405.

It is an arithmetic number, because the mean of its divisors is an integer number (24100972).

Almost surely, 2^168520387 is an apocalyptic number.

168520387 is a deficient number, since it is larger than the sum of its proper divisors (24287389).

168520387 is an equidigital number, since it uses as much as digits as its factorization.

168520387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26637.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 168520387 is about 12981.5402398945. The cubic root of 168520387 is about 552.3539735430.

The spelling of 168520387 in words is "one hundred sixty-eight million, five hundred twenty thousand, three hundred eighty-seven".