109779541 has 4 divisors (see below), whose sum is σ = 109946284. Its totient is φ = 109612800.

The previous prime is 109779521. The next prime is 109779547. The reversal of 109779541 is 145977901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145977901 = 179 ⋅815519.

It can be written as a sum of positive squares in 2 ways, for example, as 61685316 + 48094225 = 7854^2 + 6935^2 .

It is a cyclic number.

It is not a de Polignac number, because 109779541 - 2¹³ = 109771349 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109779547) 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, 82380 + ... + 83701.

It is an arithmetic number, because the mean of its divisors is an integer number (27486571).

Almost surely, 2^109779541 is an apocalyptic number.

It is an amenable number.

109779541 is a deficient number, since it is larger than the sum of its proper divisors (166743).

109779541 is an equidigital number, since it uses as much as digits as its factorization.

109779541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166742.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 109779541 is about 10477.5732400208. The cubic root of 109779541 is about 478.8216771929.

The spelling of 109779541 in words is "one hundred nine million, seven hundred seventy-nine thousand, five hundred forty-one".