108611621 has 2 divisors, whose sum is σ = 108611622. Its totient is φ = 108611620.

The previous prime is 108611609. The next prime is 108611647. The reversal of 108611621 is 126116801.

It is an a-pointer prime, because the next prime (108611647) can be obtained adding 108611621 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95550625 + 13060996 = 9775^2 + 3614^2 .

It is an emirp because it is prime and its reverse (126116801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108611621 - 2⁶ = 108611557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_6228233 and since 108611621 and 6228233 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108611821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54305810 + 54305811.

It is an arithmetic number, because the mean of its divisors is an integer number (54305811).

Almost surely, 2^108611621 is an apocalyptic number.

It is an amenable number.

108611621 is a deficient number, since it is larger than the sum of its proper divisors (1).

108611621 is an equidigital number, since it uses as much as digits as its factorization.

108611621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 108611621 is about 10421.6899301409. The cubic root of 108611621 is about 477.1175941088.

The spelling of 108611621 in words is "one hundred eight million, six hundred eleven thousand, six hundred twenty-one".