131771401 has 2 divisors, whose sum is σ = 131771402. Its totient is φ = 131771400.

The previous prime is 131771377. The next prime is 131771443. The reversal of 131771401 is 104177131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116748025 + 15023376 = 10805^2 + 3876^2 .

It is a cyclic number.

It is not a de Polignac number, because 131771401 - 2⁹ = 131770889 is a prime.

It is not a weakly prime, because it can be changed into another prime (131771491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65885700 + 65885701.

It is an arithmetic number, because the mean of its divisors is an integer number (65885701).

Almost surely, 2^131771401 is an apocalyptic number.

It is an amenable number.

131771401 is a deficient number, since it is larger than the sum of its proper divisors (1).

131771401 is an equidigital number, since it uses as much as digits as its factorization.

131771401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 131771401 is about 11479.1724875968. The cubic root of 131771401 is about 508.8702417285.

The spelling of 131771401 in words is "one hundred thirty-one million, seven hundred seventy-one thousand, four hundred one".