108921237 has 4 divisors (see below), whose sum is σ = 145228320. Its totient is φ = 72614156.

The previous prime is 108921233. The next prime is 108921251. The reversal of 108921237 is 732129801.

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.

It is a cyclic number.

It is not a de Polignac number, because 108921237 - 2² = 108921233 is a prime.

It is a super-2 number, since 2×108921237² = 23727671739220338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 108921198 and 108921207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108921233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18153537 + ... + 18153542.

It is an arithmetic number, because the mean of its divisors is an integer number (36307080).

Almost surely, 2^108921237 is an apocalyptic number.

It is an amenable number.

108921237 is a deficient number, since it is larger than the sum of its proper divisors (36307083).

108921237 is an equidigital number, since it uses as much as digits as its factorization.

108921237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36307082.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 108921237 is about 10436.5337636593. The cubic root of 108921237 is about 477.5705324207.

The spelling of 108921237 in words is "one hundred eight million, nine hundred twenty-one thousand, two hundred thirty-seven".