108785021 has 4 divisors (see below), whose sum is σ = 110568444. Its totient is φ = 107001600.

The previous prime is 108785011. The next prime is 108785041. The reversal of 108785021 is 120587801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120587801 = 967 ⋅124703.

It can be written as a sum of positive squares in 2 ways, for example, as 3496900 + 105288121 = 1870^2 + 10261^2 .

It is a cyclic number.

It is not a de Polignac number, because 108785021 - 2⁶ = 108784957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108785011) 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, 891620 + ... + 891741.

It is an arithmetic number, because the mean of its divisors is an integer number (27642111).

Almost surely, 2^108785021 is an apocalyptic number.

It is an amenable number.

108785021 is a deficient number, since it is larger than the sum of its proper divisors (1783423).

108785021 is an equidigital number, since it uses as much as digits as its factorization.

108785021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783422.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 108785021 is about 10430.0058005737. The cubic root of 108785021 is about 477.3713674508.

The spelling of 108785021 in words is "one hundred eight million, seven hundred eighty-five thousand, twenty-one".