109581988 has 6 divisors (see below), whose sum is σ = 191768486. Its totient is φ = 54790992.

The previous prime is 109581961. The next prime is 109581991. The reversal of 109581988 is 889185901.

It can be written as a sum of positive squares in only one way, i.e., 71537764 + 38044224 = 8458^2 + 6168^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13697745 + ... + 13697752.

Almost surely, 2^109581988 is an apocalyptic number.

It is an amenable number.

109581988 is a deficient number, since it is larger than the sum of its proper divisors (82186498).

109581988 is a wasteful number, since it uses less digits than its factorization.

109581988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27395501 (or 27395499 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 49.

The square root of 109581988 is about 10468.1415733644. The cubic root of 109581988 is about 478.5342846730.

The spelling of 109581988 in words is "one hundred nine million, five hundred eighty-one thousand, nine hundred eighty-eight".