131775397 has 8 divisors (see below), whose sum is σ = 143709440. Its totient is φ = 120098160.

The previous prime is 131775377. The next prime is 131775401. The reversal of 131775397 is 793577131.

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

It is not a de Polignac number, because 131775397 - 2¹⁵ = 131742629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131775307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63129 + ... + 65182.

It is an arithmetic number, because the mean of its divisors is an integer number (17963680).

Almost surely, 2^131775397 is an apocalyptic number.

It is an amenable number.

131775397 is a deficient number, since it is larger than the sum of its proper divisors (11934043).

131775397 is a wasteful number, since it uses less digits than its factorization.

131775397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128403.

The product of its digits is 138915, while the sum is 43.

The square root of 131775397 is about 11479.3465406355. The cubic root of 131775397 is about 508.8753855480.

The spelling of 131775397 in words is "one hundred thirty-one million, seven hundred seventy-five thousand, three hundred ninety-seven".