131219387 has 4 divisors (see below), whose sum is σ = 141313200. Its totient is φ = 121125576.

The previous prime is 131219381. The next prime is 131219399. The reversal of 131219387 is 783912131.

It is a happy number.

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

It is not a de Polignac number, because 131219387 - 2¹⁴ = 131203003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131219381) 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, 5046887 + ... + 5046912.

It is an arithmetic number, because the mean of its divisors is an integer number (35328300).

Almost surely, 2^131219387 is an apocalyptic number.

131219387 is a deficient number, since it is larger than the sum of its proper divisors (10093813).

131219387 is a wasteful number, since it uses less digits than its factorization.

131219387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10093812.

The product of its digits is 9072, while the sum is 35.

The square root of 131219387 is about 11455.1030986194. The cubic root of 131219387 is about 508.1586642981.

The spelling of 131219387 in words is "one hundred thirty-one million, two hundred nineteen thousand, three hundred eighty-seven".