11700639 has 8 divisors (see below), whose sum is σ = 17334320. Its totient is φ = 7800408.

The previous prime is 11700613. The next prime is 11700643. The reversal of 11700639 is 93600711.

It is not a de Polignac number, because 11700639 - 2⁷ = 11700511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 433357 = 11700639 / (1 + 1 + 7 + 0 + 0 + 6 + 3 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11701639) 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 in 7 ways as a sum of consecutive naturals, for example, 216652 + ... + 216705.

It is an arithmetic number, because the mean of its divisors is an integer number (2166790).

Almost surely, 2^11700639 is an apocalyptic number.

11700639 is a deficient number, since it is larger than the sum of its proper divisors (5633681).

11700639 is an equidigital number, since it uses as much as digits as its factorization.

11700639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433366 (or 433360 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 11700639 is about 3420.6196807011. The cubic root of 11700639 is about 227.0230008973.

The spelling of 11700639 in words is "eleven million, seven hundred thousand, six hundred thirty-nine".