11662639 has 2 divisors, whose sum is σ = 11662640.
Its totient is φ = 11662638.
The previous prime is 11662631. The next prime is 11662657. The reversal of 11662639 is 93626611.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 11662639 - 23 = 11662631 is a prime.
It is equal to p767356 and since 11662639 and 767356 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 (11662631) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831319 + 5831320.
It is an arithmetic number, because the mean of its divisors is an integer number (5831320).
Almost surely, 211662639 is an apocalyptic number.
11662639 is a deficient number, since it is larger than the sum of its proper divisors (1).
11662639 is an equidigital number, since it uses as much as digits as its factorization.
11662639 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 11664, while the sum is 34.
The square root of 11662639 is about 3415.0606143962.
The cubic root of 11662639 is about 226.7769678944.
The spelling of 11662639 in words is "eleven million, six hundred sixty-two thousand, six hundred thirty-nine".