11690639 has 4 divisors (see below), whose sum is σ = 11939424. Its totient is φ = 11441856.

The previous prime is 11690593. The next prime is 11690677. The reversal of 11690639 is 93609611.

11690639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93609611 = 7177 ⋅13043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11690639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11690599 and 11690608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11690839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124322 + ... + 124415.

It is an arithmetic number, because the mean of its divisors is an integer number (2984856).

Almost surely, 2^11690639 is an apocalyptic number.

11690639 is a deficient number, since it is larger than the sum of its proper divisors (248785).

11690639 is an equidigital number, since it uses as much as digits as its factorization.

11690639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248784.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 11690639 is about 3419.1576448008. The cubic root of 11690639 is about 226.9583070782.

The spelling of 11690639 in words is "eleven million, six hundred ninety thousand, six hundred thirty-nine".