131194549 has 2 divisors, whose sum is σ = 131194550. Its totient is φ = 131194548.

The previous prime is 131194523. The next prime is 131194577. The reversal of 131194549 is 945491131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110628324 + 20566225 = 10518^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 131194549 - 2⁷ = 131194421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131194949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65597274 + 65597275.

It is an arithmetic number, because the mean of its divisors is an integer number (65597275).

Almost surely, 2^131194549 is an apocalyptic number.

It is an amenable number.

131194549 is a deficient number, since it is larger than the sum of its proper divisors (1).

131194549 is an equidigital number, since it uses as much as digits as its factorization.

131194549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 37.

The square root of 131194549 is about 11454.0189016781. The cubic root of 131194549 is about 508.1265998254.

The spelling of 131194549 in words is "one hundred thirty-one million, one hundred ninety-four thousand, five hundred forty-nine".