131819461 has 2 divisors, whose sum is σ = 131819462. Its totient is φ = 131819460.

The previous prime is 131819453. The next prime is 131819491. The reversal of 131819461 is 164918131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125664100 + 6155361 = 11210^2 + 2481^2 .

It is a cyclic number.

It is not a de Polignac number, because 131819461 - 2³ = 131819453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131819491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65909730 + 65909731.

It is an arithmetic number, because the mean of its divisors is an integer number (65909731).

Almost surely, 2^131819461 is an apocalyptic number.

It is an amenable number.

131819461 is a deficient number, since it is larger than the sum of its proper divisors (1).

131819461 is an equidigital number, since it uses as much as digits as its factorization.

131819461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 131819461 is about 11481.2656532283. The cubic root of 131819461 is about 508.9320996910.

The spelling of 131819461 in words is "one hundred thirty-one million, eight hundred nineteen thousand, four hundred sixty-one".