11389621 has 2 divisors, whose sum is σ = 11389622. Its totient is φ = 11389620.

The previous prime is 11389619. The next prime is 11389639. The reversal of 11389621 is 12698311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 4040100 = 2711^2 + 2010^2 .

It is an emirp because it is prime and its reverse (12698311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11389621 - 2¹ = 11389619 is a prime.

Together with 11389619, it forms a pair of twin primes.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11389661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5694810 + 5694811.

It is an arithmetic number, because the mean of its divisors is an integer number (5694811).

Almost surely, 2^11389621 is an apocalyptic number.

It is an amenable number.

11389621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11389621 is an equidigital number, since it uses as much as digits as its factorization.

11389621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 31.

The square root of 11389621 is about 3374.8512559815. The cubic root of 11389621 is about 224.9933891062.

The spelling of 11389621 in words is "eleven million, three hundred eighty-nine thousand, six hundred twenty-one".