131193949 has 2 divisors, whose sum is σ = 131193950. Its totient is φ = 131193948.

The previous prime is 131193943. The next prime is 131193961. The reversal of 131193949 is 949391131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110880900 + 20313049 = 10530^2 + 4507^2 .

It is a cyclic number.

It is not a de Polignac number, because 131193949 - 2¹¹ = 131191901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131193943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65596974 + 65596975.

It is an arithmetic number, because the mean of its divisors is an integer number (65596975).

Almost surely, 2^131193949 is an apocalyptic number.

It is an amenable number.

131193949 is a deficient number, since it is larger than the sum of its proper divisors (1).

131193949 is an equidigital number, since it uses as much as digits as its factorization.

131193949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 131193949 is about 11453.9927099680. The cubic root of 131193949 is about 508.1258252088.

The spelling of 131193949 in words is "one hundred thirty-one million, one hundred ninety-three thousand, nine hundred forty-nine".