131398005 has 8 divisors (see below), whose sum is σ = 210236832. Its totient is φ = 70078928.

The previous prime is 131397991. The next prime is 131398013. The reversal of 131398005 is 500893131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131398005 - 2¹⁰ = 131396981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4379919 + ... + 4379948.

It is an arithmetic number, because the mean of its divisors is an integer number (26279604).

Almost surely, 2^131398005 is an apocalyptic number.

131398005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131398005 is a deficient number, since it is larger than the sum of its proper divisors (78838827).

131398005 is an equidigital number, since it uses as much as digits as its factorization.

131398005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759875.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 131398005 is about 11462.8968851683. The cubic root of 131398005 is about 508.3891310843.

The spelling of 131398005 in words is "one hundred thirty-one million, three hundred ninety-eight thousand, five".