131198377 has 2 divisors, whose sum is σ = 131198378. Its totient is φ = 131198376.

The previous prime is 131198351. The next prime is 131198383. The reversal of 131198377 is 773891131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115326121 + 15872256 = 10739^2 + 3984^2 .

It is a cyclic number.

It is not a de Polignac number, because 131198377 - 2²³ = 122809769 is a prime.

It is not a weakly prime, because it can be changed into another prime (131198317) 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, 65599188 + 65599189.

It is an arithmetic number, because the mean of its divisors is an integer number (65599189).

Almost surely, 2^131198377 is an apocalyptic number.

It is an amenable number.

131198377 is a deficient number, since it is larger than the sum of its proper divisors (1).

131198377 is an equidigital number, since it uses as much as digits as its factorization.

131198377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 131198377 is about 11454.1860033789. The cubic root of 131198377 is about 508.1315418237.

The spelling of 131198377 in words is "one hundred thirty-one million, one hundred ninety-eight thousand, three hundred seventy-seven".