1108638451 has 4 divisors (see below), whose sum is σ = 1108763392. Its totient is φ = 1108513512.

The previous prime is 1108638439. The next prime is 1108638463. The reversal of 1108638451 is 1548368011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1548368011 = 28123 ⋅55057.

It is an interprime number because it is at equal distance from previous prime (1108638439) and next prime (1108638463).

It is a cyclic number.

It is not a de Polignac number, because 1108638451 - 2⁹ = 1108637939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1108638451.

It is not an unprimeable number, because it can be changed into a prime (1108638431) 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, 48051 + ... + 67276.

It is an arithmetic number, because the mean of its divisors is an integer number (277190848).

Almost surely, 2^1108638451 is an apocalyptic number.

1108638451 is a deficient number, since it is larger than the sum of its proper divisors (124941).

1108638451 is an equidigital number, since it uses as much as digits as its factorization.

1108638451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124940.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 1108638451 is about 33296.2227737622. Note that the first 3 decimals coincide. The cubic root of 1108638451 is about 1034.9752850252.

The spelling of 1108638451 in words is "one billion, one hundred eight million, six hundred thirty-eight thousand, four hundred fifty-one".