168106399 has 8 divisors (see below), whose sum is σ = 171181440. Its totient is φ = 165039000.

The previous prime is 168106373. The next prime is 168106409. The reversal of 168106399 is 993601861.

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 168106399 - 2¹³ = 168098207 is a prime.

It is a super-2 number, since 2×168106399² = 56519522769494402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168106339) 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, 60654 + ... + 63364.

It is an arithmetic number, because the mean of its divisors is an integer number (21397680).

Almost surely, 2^168106399 is an apocalyptic number.

168106399 is a deficient number, since it is larger than the sum of its proper divisors (3075041).

168106399 is a wasteful number, since it uses less digits than its factorization.

168106399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 168106399 is about 12965.5851776925. The cubic root of 168106399 is about 551.9012975083.

The spelling of 168106399 in words is "one hundred sixty-eight million, one hundred six thousand, three hundred ninety-nine".