109155997 has 8 divisors (see below), whose sum is σ = 116128512. Its totient is φ = 102244800.

The previous prime is 109155967. The next prime is 109156009. The reversal of 109155997 is 799551901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-109155997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109155967) 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 7 ways as a sum of consecutive naturals, for example, 11629 + ... + 18802.

It is an arithmetic number, because the mean of its divisors is an integer number (14516064).

Almost surely, 2^109155997 is an apocalyptic number.

109155997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

109155997 is a deficient number, since it is larger than the sum of its proper divisors (6972515).

109155997 is a wasteful number, since it uses less digits than its factorization.

109155997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30659.

The product of its (nonzero) digits is 127575, while the sum is 46.

The square root of 109155997 is about 10447.7747391490. The cubic root of 109155997 is about 477.9133918119.

The spelling of 109155997 in words is "one hundred nine million, one hundred fifty-five thousand, nine hundred ninety-seven".