131193890 has 8 divisors (see below), whose sum is σ = 236149020. Its totient is φ = 52477552.

The previous prime is 131193869. The next prime is 131193901. The reversal of 131193890 is 98391131.

It can be written as a sum of positive squares in 2 ways, for example, as 126045529 + 5148361 = 11227^2 + 2269^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131193890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6559685 + ... + 6559704.

Almost surely, 2^131193890 is an apocalyptic number.

131193890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131193890 is a deficient number, since it is larger than the sum of its proper divisors (104955130).

131193890 is a wasteful number, since it uses less digits than its factorization.

131193890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13119396.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 131193890 is about 11453.9901344466. The cubic root of 131193890 is about 508.1257490381.

The spelling of 131193890 in words is "one hundred thirty-one million, one hundred ninety-three thousand, eight hundred ninety".