131897808 has 300 divisors, whose sum is σ = 465244032. Its totient is φ = 35925120.

The previous prime is 131897803. The next prime is 131897809. The reversal of 131897808 is 808798131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131897803) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1968591 + ... + 1968657.

Almost surely, 2^131897808 is an apocalyptic number.

131897808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131897808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232622016).

131897808 is an abundant number, since it is smaller than the sum of its proper divisors (333346224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131897808 is a wasteful number, since it uses less digits than its factorization.

131897808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 131897808 is about 11484.6770960267. The cubic root of 131897808 is about 509.0329077860.

The spelling of 131897808 in words is "one hundred thirty-one million, eight hundred ninety-seven thousand, eight hundred eight".