131197982 has 4 divisors (see below), whose sum is σ = 196796976. Its totient is φ = 65598990.

The previous prime is 131197973. The next prime is 131197987. The reversal of 131197982 is 289791131.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131197987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32799494 + ... + 32799497.

It is an arithmetic number, because the mean of its divisors is an integer number (49199244).

Almost surely, 2^131197982 is an apocalyptic number.

131197982 is a deficient number, since it is larger than the sum of its proper divisors (65598994).

131197982 is an equidigital number, since it uses as much as digits as its factorization.

131197982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65598993.

The product of its digits is 27216, while the sum is 41.

The square root of 131197982 is about 11454.1687607613. The cubic root of 131197982 is about 508.1310318780.

The spelling of 131197982 in words is "one hundred thirty-one million, one hundred ninety-seven thousand, nine hundred eighty-two".