131577949 has 2 divisors, whose sum is σ = 131577950. Its totient is φ = 131577948.

The previous prime is 131577937. The next prime is 131577961. The reversal of 131577949 is 949775131.

It is a balanced prime because it is at equal distance from previous prime (131577937) and next prime (131577961).

It can be written as a sum of positive squares in only one way, i.e., 101404900 + 30173049 = 10070^2 + 5493^2 .

It is an emirp because it is prime and its reverse (949775131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131577949 - 2⁷ = 131577821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131577899 and 131577908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131577989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65788974 + 65788975.

It is an arithmetic number, because the mean of its divisors is an integer number (65788975).

Almost surely, 2^131577949 is an apocalyptic number.

It is an amenable number.

131577949 is a deficient number, since it is larger than the sum of its proper divisors (1).

131577949 is an equidigital number, since it uses as much as digits as its factorization.

131577949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 46.

The square root of 131577949 is about 11470.7431755750. The cubic root of 131577949 is about 508.6210976846.

The spelling of 131577949 in words is "one hundred thirty-one million, five hundred seventy-seven thousand, nine hundred forty-nine".