108966621 has 4 divisors (see below), whose sum is σ = 145288832. Its totient is φ = 72644412.

The previous prime is 108966619. The next prime is 108966631. The reversal of 108966621 is 126669801.

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: 126669801 = 3 ⋅42223267.

It is not a de Polignac number, because 108966621 - 2¹ = 108966619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 108966621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108966631) 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, 18161101 + ... + 18161106.

It is an arithmetic number, because the mean of its divisors is an integer number (36322208).

Almost surely, 2^108966621 is an apocalyptic number.

It is an amenable number.

108966621 is a deficient number, since it is larger than the sum of its proper divisors (36322211).

108966621 is an equidigital number, since it uses as much as digits as its factorization.

108966621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36322210.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 108966621 is about 10438.7078223313. The cubic root of 108966621 is about 477.6368526720.

The spelling of 108966621 in words is "one hundred eight million, nine hundred sixty-six thousand, six hundred twenty-one".