109791787 has 4 divisors (see below), whose sum is σ = 125476336. Its totient is φ = 94107240.

The previous prime is 109791769. The next prime is 109791833. The reversal of 109791787 is 787197901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109791787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109791787.

It is not an unprimeable number, because it can be changed into a prime (109791757) 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, 7842264 + ... + 7842277.

It is an arithmetic number, because the mean of its divisors is an integer number (31369084).

Almost surely, 2^109791787 is an apocalyptic number.

109791787 is a deficient number, since it is larger than the sum of its proper divisors (15684549).

109791787 is an equidigital number, since it uses as much as digits as its factorization.

109791787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15684548.

The product of its (nonzero) digits is 222264, while the sum is 49.

The square root of 109791787 is about 10478.1576147718. The cubic root of 109791787 is about 478.8394808510.

The spelling of 109791787 in words is "one hundred nine million, seven hundred ninety-one thousand, seven hundred eighty-seven".