168012401 has 4 divisors (see below), whose sum is σ = 175317312. Its totient is φ = 160707492.

The previous prime is 168012373. The next prime is 168012407. The reversal of 168012401 is 104210861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104210861 = 23 ⋅4530907.

It is a cyclic number.

It is not a de Polignac number, because 168012401 - 2¹⁰ = 168011377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 7304887 = 168012401 / (1 + 6 + 8 + 0 + 1 + 2 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168012407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3652421 + ... + 3652466.

It is an arithmetic number, because the mean of its divisors is an integer number (43829328).

Almost surely, 2^168012401 is an apocalyptic number.

It is an amenable number.

168012401 is a deficient number, since it is larger than the sum of its proper divisors (7304911).

168012401 is an equidigital number, since it uses as much as digits as its factorization.

168012401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7304910.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 168012401 is about 12961.9597669488. The cubic root of 168012401 is about 551.7984116956.

The spelling of 168012401 in words is "one hundred sixty-eight million, twelve thousand, four hundred one".