107561191 has 4 divisors (see below), whose sum is σ = 107641584. Its totient is φ = 107480800.

The previous prime is 107561173. The next prime is 107561249. The reversal of 107561191 is 191165701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191165701 = 79 ⋅2419819.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107561191 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107561141) 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, 38155 + ... + 40876.

It is an arithmetic number, because the mean of its divisors is an integer number (26910396).

Almost surely, 2^107561191 is an apocalyptic number.

107561191 is a deficient number, since it is larger than the sum of its proper divisors (80393).

107561191 is an equidigital number, since it uses as much as digits as its factorization.

107561191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80392.

The product of its (nonzero) digits is 1890, while the sum is 31.

The square root of 107561191 is about 10371.1711489108. The cubic root of 107561191 is about 475.5744717047.

The spelling of 107561191 in words is "one hundred seven million, five hundred sixty-one thousand, one hundred ninety-one".