131772349 has 4 divisors (see below), whose sum is σ = 134576064. Its totient is φ = 128968636.

The previous prime is 131772343. The next prime is 131772367. The reversal of 131772349 is 943277131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 943277131 = 149 ⋅6330719.

It is a cyclic number.

It is not a de Polignac number, because 131772349 - 2³ = 131772341 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 (131772341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401787 + ... + 1401880.

It is an arithmetic number, because the mean of its divisors is an integer number (33644016).

Almost surely, 2^131772349 is an apocalyptic number.

It is an amenable number.

131772349 is a deficient number, since it is larger than the sum of its proper divisors (2803715).

131772349 is an equidigital number, since it uses as much as digits as its factorization.

131772349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803714.

The product of its digits is 31752, while the sum is 37.

The square root of 131772349 is about 11479.2137796976. The cubic root of 131772349 is about 508.8714620434.

The spelling of 131772349 in words is "one hundred thirty-one million, seven hundred seventy-two thousand, three hundred forty-nine".