108921730 has 16 divisors (see below), whose sum is σ = 198422784. Its totient is φ = 43043440.

The previous prime is 108921727. The next prime is 108921749. The reversal of 108921730 is 37129801.

It is a junction number, because it is equal to n+sod(n) for n = 108921692 and 108921701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64786 + ... + 66445.

It is an arithmetic number, because the mean of its divisors is an integer number (12401424).

Almost surely, 2^108921730 is an apocalyptic number.

108921730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108921730 is a deficient number, since it is larger than the sum of its proper divisors (89501054).

108921730 is a wasteful number, since it uses less digits than its factorization.

108921730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131321.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 108921730 is about 10436.5573825855. The cubic root of 108921730 is about 477.5712529472.

The spelling of 108921730 in words is "one hundred eight million, nine hundred twenty-one thousand, seven hundred thirty".