105621817 has 8 divisors (see below), whose sum is σ = 127064000. Its totient is φ = 85767984.

The previous prime is 105621793. The next prime is 105621821. The reversal of 105621817 is 718126501.

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 105621817 - 2⁷ = 105621689 is a prime.

It is a super-2 number, since 2×105621817² = 22311936452762978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105621877) 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, 396942 + ... + 397207.

It is an arithmetic number, because the mean of its divisors is an integer number (15883000).

Almost surely, 2^105621817 is an apocalyptic number.

It is an amenable number.

105621817 is a deficient number, since it is larger than the sum of its proper divisors (21442183).

105621817 is an equidigital number, since it uses as much as digits as its factorization.

105621817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794175.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 105621817 is about 10277.2475400761. The cubic root of 105621817 is about 472.6988489578.

The spelling of 105621817 in words is "one hundred five million, six hundred twenty-one thousand, eight hundred seventeen".