108939481 has 4 divisors (see below), whose sum is σ = 124502272. Its totient is φ = 93376692.

The previous prime is 108939463. The next prime is 108939497. The reversal of 108939481 is 184939801.

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: 184939801 = 37 ⋅4998373.

It is a cyclic number.

It is not a de Polignac number, because 108939481 - 2⁷ = 108939353 is a prime.

It is a super-2 number, since 2×108939481² = 23735621041098722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108939401) 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, 7781385 + ... + 7781398.

It is an arithmetic number, because the mean of its divisors is an integer number (31125568).

Almost surely, 2^108939481 is an apocalyptic number.

It is an amenable number.

108939481 is a deficient number, since it is larger than the sum of its proper divisors (15562791).

108939481 is an equidigital number, since it uses as much as digits as its factorization.

108939481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15562790.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 108939481 is about 10437.4077720476. The cubic root of 108939481 is about 477.5971948378.

The spelling of 108939481 in words is "one hundred eight million, nine hundred thirty-nine thousand, four hundred eighty-one".