109291925 has 6 divisors (see below), whose sum is σ = 135522018. Its totient is φ = 87433520.

The previous prime is 109291921. The next prime is 109291927. The reversal of 109291925 is 529192901.

It can be written as a sum of positive squares in 3 ways, for example, as 12013156 + 97278769 = 3466^2 + 9863^2 .

It is not a de Polignac number, because 109291925 - 2² = 109291921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109291921) 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 5 ways as a sum of consecutive naturals, for example, 2185814 + ... + 2185863.

It is an arithmetic number, because the mean of its divisors is an integer number (22587003).

Almost surely, 2^109291925 is an apocalyptic number.

It is an amenable number.

109291925 is a deficient number, since it is larger than the sum of its proper divisors (26230093).

109291925 is an equidigital number, since it uses as much as digits as its factorization.

109291925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371687 (or 4371682 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 109291925 is about 10454.2778325430. The cubic root of 109291925 is about 478.1116855905. Note that the first 3 decimals are identical.

The spelling of 109291925 in words is "one hundred nine million, two hundred ninety-one thousand, nine hundred twenty-five".