131298821 has 2 divisors, whose sum is σ = 131298822. Its totient is φ = 131298820.

The previous prime is 131298767. The next prime is 131298841. The reversal of 131298821 is 128892131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131217025 + 81796 = 11455^2 + 286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131298821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131298841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65649410 + 65649411.

It is an arithmetic number, because the mean of its divisors is an integer number (65649411).

Almost surely, 2^131298821 is an apocalyptic number.

It is an amenable number.

131298821 is a deficient number, since it is larger than the sum of its proper divisors (1).

131298821 is an equidigital number, since it uses as much as digits as its factorization.

131298821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 131298821 is about 11458.5697624093. The cubic root of 131298821 is about 508.2611820077.

The spelling of 131298821 in words is "one hundred thirty-one million, two hundred ninety-eight thousand, eight hundred twenty-one".