131287394 has 8 divisors (see below), whose sum is σ = 225064128. Its totient is φ = 56266020.

The previous prime is 131287391. The next prime is 131287411. The reversal of 131287394 is 493782131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×131287394² = 34472759646622472, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131287391) 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, 4688822 + ... + 4688849.

It is an arithmetic number, because the mean of its divisors is an integer number (28133016).

Almost surely, 2^131287394 is an apocalyptic number.

131287394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

131287394 is a deficient number, since it is larger than the sum of its proper divisors (93776734).

131287394 is an equidigital number, since it uses as much as digits as its factorization.

131287394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9377680.

The product of its digits is 36288, while the sum is 38.

The square root of 131287394 is about 11458.0711291212. The cubic root of 131287394 is about 508.2464368410.

The spelling of 131287394 in words is "one hundred thirty-one million, two hundred eighty-seven thousand, three hundred ninety-four".