131293489 has 4 divisors (see below), whose sum is σ = 132327424. Its totient is φ = 130259556.

The previous prime is 131293471. The next prime is 131293517. The reversal of 131293489 is 984392131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 984392131 = 251 ⋅3921881.

It is a cyclic number.

It is not a de Polignac number, because 131293489 - 2¹⁷ = 131162417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131293429) 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, 516777 + ... + 517030.

It is an arithmetic number, because the mean of its divisors is an integer number (33081856).

Almost surely, 2^131293489 is an apocalyptic number.

It is an amenable number.

131293489 is a deficient number, since it is larger than the sum of its proper divisors (1033935).

131293489 is a wasteful number, since it uses less digits than its factorization.

131293489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033934.

The product of its digits is 46656, while the sum is 40.

The square root of 131293489 is about 11458.3370957570. The cubic root of 131293489 is about 508.2543018106.

The spelling of 131293489 in words is "one hundred thirty-one million, two hundred ninety-three thousand, four hundred eighty-nine".