131398 has 4 divisors (see below), whose sum is σ = 197100. Its totient is φ = 65698.

The previous prime is 131381. The next prime is 131413. The reversal of 131398 is 893131.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32848 + ... + 32851.

It is an arithmetic number, because the mean of its divisors is an integer number (49275).

2¹³¹³⁹⁸ is an apocalyptic number.

131398 is a deficient number, since it is larger than the sum of its proper divisors (65702).

131398 is an equidigital number, since it uses as much as digits as its factorization.

131398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65701.

The product of its digits is 648, while the sum is 25.

The square root of 131398 is about 362.4886205110. The cubic root of 131398 is about 50.8389124636.

It can be divided in two parts, 131 and 398, that added together give a square (529 = 23²).

The spelling of 131398 in words is "one hundred thirty-one thousand, three hundred ninety-eight".