131897401 has 2 divisors, whose sum is σ = 131897402. Its totient is φ = 131897400.

The previous prime is 131897357. The next prime is 131897413. The reversal of 131897401 is 104798131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128799801 + 3097600 = 11349^2 + 1760^2 .

It is an emirp because it is prime and its reverse (104798131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131897401 - 2⁹ = 131896889 is a prime.

It is not a weakly prime, because it can be changed into another prime (131897461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65948700 + 65948701.

It is an arithmetic number, because the mean of its divisors is an integer number (65948701).

Almost surely, 2^131897401 is an apocalyptic number.

It is an amenable number.

131897401 is a deficient number, since it is larger than the sum of its proper divisors (1).

131897401 is an equidigital number, since it uses as much as digits as its factorization.

131897401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 131897401 is about 11484.6593767512. The cubic root of 131897401 is about 509.0323842074.

The spelling of 131897401 in words is "one hundred thirty-one million, eight hundred ninety-seven thousand, four hundred one".