3631687131 has 4 divisors (see below), whose sum is σ = 4842249512. Its totient is φ = 2421124752.

The previous prime is 3631687093. The next prime is 3631687141. The reversal of 3631687131 is 1317861363.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-3631687131 is a prime.

It is a super-2 number, since 2×3631687131² = 26378302834942022322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3631687131.

It is not an unprimeable number, because it can be changed into a prime (3631687141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 605281186 + ... + 605281191.

It is an arithmetic number, because the mean of its divisors is an integer number (1210562378).

Almost surely, 2^3631687131 is an apocalyptic number.

3631687131 is a deficient number, since it is larger than the sum of its proper divisors (1210562381).

3631687131 is a wasteful number, since it uses less digits than its factorization.

3631687131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210562380.

The product of its digits is 54432, while the sum is 39.

The square root of 3631687131 is about 60263.4809067648. The cubic root of 3631687131 is about 1537.1024296121.

The spelling of 3631687131 in words is "three billion, six hundred thirty-one million, six hundred eighty-seven thousand, one hundred thirty-one".