11701639 has 2 divisors, whose sum is σ = 11701640. Its totient is φ = 11701638.

The previous prime is 11701609. The next prime is 11701649. The reversal of 11701639 is 93610711.

11701639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (93610711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11701639 - 2⁹ = 11701127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11701609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5850819 + 5850820.

It is an arithmetic number, because the mean of its divisors is an integer number (5850820).

Almost surely, 2^11701639 is an apocalyptic number.

11701639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11701639 is an equidigital number, since it uses as much as digits as its factorization.

11701639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 11701639 is about 3420.7658499231. The cubic root of 11701639 is about 227.0294682516.

It can be divided in two parts, 1170 and 1639, that added together give a square (2809 = 53²).

The spelling of 11701639 in words is "eleven million, seven hundred one thousand, six hundred thirty-nine".