108457621 has 4 divisors (see below), whose sum is σ = 108731212. Its totient is φ = 108184032.

The previous prime is 108457597. The next prime is 108457639. The reversal of 108457621 is 126754801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126754801 = 3907 ⋅32443.

It can be written as a sum of positive squares in 2 ways, for example, as 79459396 + 28998225 = 8914^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 108457621 - 2⁵ = 108457589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108457691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136200 + ... + 136993.

It is an arithmetic number, because the mean of its divisors is an integer number (27182803).

Almost surely, 2^108457621 is an apocalyptic number.

It is an amenable number.

108457621 is a deficient number, since it is larger than the sum of its proper divisors (273591).

108457621 is an equidigital number, since it uses as much as digits as its factorization.

108457621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273590.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 108457621 is about 10414.2988722237. The cubic root of 108457621 is about 476.8919863781.

The spelling of 108457621 in words is "one hundred eight million, four hundred fifty-seven thousand, six hundred twenty-one".