131448946 has 4 divisors (see below), whose sum is σ = 197173422. Its totient is φ = 65724472.

The previous prime is 131448943. The next prime is 131448953. The reversal of 131448946 is 649844131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649844131 = 21563 ⋅30137.

It can be written as a sum of positive squares in only one way, i.e., 66243321 + 65205625 = 8139^2 + 8075^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 131448899 and 131448908.

It is not an unprimeable number, because it can be changed into a prime (131448943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32862235 + ... + 32862238.

Almost surely, 2^131448946 is an apocalyptic number.

131448946 is a deficient number, since it is larger than the sum of its proper divisors (65724476).

131448946 is an equidigital number, since it uses as much as digits as its factorization.

131448946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65724475.

The product of its digits is 82944, while the sum is 40.

The square root of 131448946 is about 11465.1186648896. The cubic root of 131448946 is about 508.4548208303.

The spelling of 131448946 in words is "one hundred thirty-one million, four hundred forty-eight thousand, nine hundred forty-six".