11908621 has 2 divisors, whose sum is σ = 11908622. Its totient is φ = 11908620.

The previous prime is 11908613. The next prime is 11908639. The reversal of 11908621 is 12680911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6687396 + 5221225 = 2586^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 11908621 - 2³ = 11908613 is a prime.

It is equal to p₇₈₂₄₃₄ and since 11908621 and 782434 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11908621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11908661) 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 as a sum of consecutive naturals, namely, 5954310 + 5954311.

It is an arithmetic number, because the mean of its divisors is an integer number (5954311).

Almost surely, 2^11908621 is an apocalyptic number.

It is an amenable number.

11908621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11908621 is an equidigital number, since it uses as much as digits as its factorization.

11908621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 11908621 is about 3450.8869874280. The cubic root of 11908621 is about 228.3602402566.

The spelling of 11908621 in words is "eleven million, nine hundred eight thousand, six hundred twenty-one".