108442637 has 4 divisors (see below), whose sum is σ = 108623676. Its totient is φ = 108261600.

The previous prime is 108442601. The next prime is 108442639. The reversal of 108442637 is 736244801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 736244801 = 47 ⋅15664783.

It can be written as a sum of positive squares in 2 ways, for example, as 73170916 + 35271721 = 8554^2 + 5939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108442637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108442597 and 108442606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108442639) 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, 89618 + ... + 90819.

It is an arithmetic number, because the mean of its divisors is an integer number (27155919).

Almost surely, 2^108442637 is an apocalyptic number.

It is an amenable number.

108442637 is a deficient number, since it is larger than the sum of its proper divisors (181039).

108442637 is an equidigital number, since it uses as much as digits as its factorization.

108442637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181038.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 108442637 is about 10413.5794518504. The cubic root of 108442637 is about 476.8700236411.

The spelling of 108442637 in words is "one hundred eight million, four hundred forty-two thousand, six hundred thirty-seven".