109649237 has 4 divisors (see below), whose sum is σ = 109691820. Its totient is φ = 109606656.

The previous prime is 109649191. The next prime is 109649251. The reversal of 109649237 is 732946901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 732946901 = 1699 ⋅431399.

It can be written as a sum of positive squares in 2 ways, for example, as 102434641 + 7214596 = 10121^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 109649237 - 2⁶ = 109649173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109649194 and 109649203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109649297) 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, 17162 + ... + 22667.

It is an arithmetic number, because the mean of its divisors is an integer number (27422955).

Almost surely, 2^109649237 is an apocalyptic number.

It is an amenable number.

109649237 is a deficient number, since it is larger than the sum of its proper divisors (42583).

109649237 is an equidigital number, since it uses as much as digits as its factorization.

109649237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42582.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 109649237 is about 10471.3531599311. The cubic root of 109649237 is about 478.6321546847.

The spelling of 109649237 in words is "one hundred nine million, six hundred forty-nine thousand, two hundred thirty-seven".