131487669 has 24 divisors (see below), whose sum is σ = 193482432. Its totient is φ = 86029440.

The previous prime is 131487649. The next prime is 131487691. The reversal of 131487669 is 966784131.

It is a happy number.

It is not a de Polignac number, because 131487669 - 2⁹ = 131487157 is a prime.

It is a super-2 number, since 2×131487669² = 34578014198107122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131487649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221437 + ... + 222029.

It is an arithmetic number, because the mean of its divisors is an integer number (8061768).

Almost surely, 2^131487669 is an apocalyptic number.

It is an amenable number.

131487669 is a deficient number, since it is larger than the sum of its proper divisors (61994763).

131487669 is a wasteful number, since it uses less digits than its factorization.

131487669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1014 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 131487669 is about 11466.8072714248. The cubic root of 131487669 is about 508.5047437943.

The spelling of 131487669 in words is "one hundred thirty-one million, four hundred eighty-seven thousand, six hundred sixty-nine".