11621639 has 2 divisors, whose sum is σ = 11621640. Its totient is φ = 11621638.

The previous prime is 11621633. The next prime is 11621657. The reversal of 11621639 is 93612611.

It is a weak prime.

It is an emirp because it is prime and its reverse (93612611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11621639 - 2⁸ = 11621383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11621633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810819 + 5810820.

It is an arithmetic number, because the mean of its divisors is an integer number (5810820).

Almost surely, 2^11621639 is an apocalyptic number.

11621639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621639 is an equidigital number, since it uses as much as digits as its factorization.

11621639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 11621639 is about 3409.0525076625. The cubic root of 11621639 is about 226.5109111141.

The spelling of 11621639 in words is "eleven million, six hundred twenty-one thousand, six hundred thirty-nine".