168621441 has 8 divisors (see below), whose sum is σ = 234603840. Its totient is φ = 107526672.

The previous prime is 168621437. The next prime is 168621449. The reversal of 168621441 is 144126861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168621441 - 2² = 168621437 is a prime.

It is a super-3 number, since 3×168621441³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (168621449) 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, 1221826 + ... + 1221963.

It is an arithmetic number, because the mean of its divisors is an integer number (29325480).

Almost surely, 2^168621441 is an apocalyptic number.

It is an amenable number.

168621441 is a deficient number, since it is larger than the sum of its proper divisors (65982399).

168621441 is a wasteful number, since it uses less digits than its factorization.

168621441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443815.

The product of its digits is 9216, while the sum is 33.

The square root of 168621441 is about 12985.4318757599. The cubic root of 168621441 is about 552.4643586544.

The spelling of 168621441 in words is "one hundred sixty-eight million, six hundred twenty-one thousand, four hundred forty-one".