168404387 has 8 divisors (see below), whose sum is σ = 169555680. Its totient is φ = 167257600.

The previous prime is 168404381. The next prime is 168404389. The reversal of 168404387 is 783404861.

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 168404387 - 2⁴ = 168404371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168404381) 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, 104387 + ... + 105987.

It is an arithmetic number, because the mean of its divisors is an integer number (21194460).

Almost surely, 2^168404387 is an apocalyptic number.

168404387 is a deficient number, since it is larger than the sum of its proper divisors (1151293).

168404387 is a wasteful number, since it uses less digits than its factorization.

168404387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 168404387 is about 12977.0715879970. The cubic root of 168404387 is about 552.2272079350.

The spelling of 168404387 in words is "one hundred sixty-eight million, four hundred four thousand, three hundred eighty-seven".