109139810 has 32 divisors (see below), whose sum is σ = 213963120. Its totient is φ = 39840768.

The previous prime is 109139803. The next prime is 109139837. The reversal of 109139810 is 18931901.

It is a Cunningham number, because it is equal to 10447²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 20948929 + 88190881 = 4577^2 + 9391^2 .

It is a super-2 number, since 2×109139810² = 23822996253672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6854 + ... + 16286.

Almost surely, 2^109139810 is an apocalyptic number.

109139810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109139810 is a deficient number, since it is larger than the sum of its proper divisors (104823310).

109139810 is a wasteful number, since it uses less digits than its factorization.

109139810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 109139810 is about 10447.0000478606. Note that the first 4 decimals coincide. The cubic root of 109139810 is about 477.8897670097.

The spelling of 109139810 in words is "one hundred nine million, one hundred thirty-nine thousand, eight hundred ten".