109951091 has 4 divisors (see below), whose sum is σ = 109992384. Its totient is φ = 109909800.

The previous prime is 109951073. The next prime is 109951111. The reversal of 109951091 is 190159901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190159901 = 1217 ⋅156253.

It is a cyclic number.

It is not a de Polignac number, because 109951091 - 2⁶ = 109951027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109951031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16355 + ... + 22076.

It is an arithmetic number, because the mean of its divisors is an integer number (27498096).

Almost surely, 2^109951091 is an apocalyptic number.

109951091 is a deficient number, since it is larger than the sum of its proper divisors (41293).

109951091 is an equidigital number, since it uses as much as digits as its factorization.

109951091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41292.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 109951091 is about 10485.7565773768. The cubic root of 109951091 is about 479.0709619808.

The spelling of 109951091 in words is "one hundred nine million, nine hundred fifty-one thousand, ninety-one".