11659431 has 16 divisors (see below), whose sum is σ = 18146304. Its totient is φ = 6520224.

The previous prime is 11659429. The next prime is 11659447. The reversal of 11659431 is 13495611.

11659431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11659431 - 2¹ = 11659429 is a prime.

It is a super-2 number, since 2×11659431² = 271884662487522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11659411) 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 15 ways as a sum of consecutive naturals, for example, 4920 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (1134144).

Almost surely, 2^11659431 is an apocalyptic number.

11659431 is a deficient number, since it is larger than the sum of its proper divisors (6486873).

11659431 is a wasteful number, since it uses less digits than its factorization.

11659431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11870.

The product of its digits is 3240, while the sum is 30.

The square root of 11659431 is about 3414.5908978968. The cubic root of 11659431 is about 226.7561730804.

It can be divided in two parts, 11659 and 431, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 11659431 in words is "eleven million, six hundred fifty-nine thousand, four hundred thirty-one".