131349639 has 16 divisors (see below), whose sum is σ = 177243264. Its totient is φ = 86517600.

The previous prime is 131349637. The next prime is 131349677. The reversal of 131349639 is 936943131.

It is not a de Polignac number, because 131349639 - 2¹ = 131349637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131349597 and 131349606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131349637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110629 + ... + 111809.

It is an arithmetic number, because the mean of its divisors is an integer number (11077704).

Almost surely, 2^131349639 is an apocalyptic number.

131349639 is a deficient number, since it is larger than the sum of its proper divisors (45893625).

131349639 is a wasteful number, since it uses less digits than its factorization.

131349639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598.

The product of its digits is 52488, while the sum is 39.

The square root of 131349639 is about 11460.7870148607. The cubic root of 131349639 is about 508.3267461537.

The spelling of 131349639 in words is "one hundred thirty-one million, three hundred forty-nine thousand, six hundred thirty-nine".