131869501 has 2 divisors, whose sum is σ = 131869502. Its totient is φ = 131869500.

The previous prime is 131869483. The next prime is 131869513. The reversal of 131869501 is 105968131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113934276 + 17935225 = 10674^2 + 4235^2 .

It is a cyclic number.

It is not a de Polignac number, because 131869501 - 2¹³ = 131861309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131839501) 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, 65934750 + 65934751.

It is an arithmetic number, because the mean of its divisors is an integer number (65934751).

Almost surely, 2^131869501 is an apocalyptic number.

It is an amenable number.

131869501 is a deficient number, since it is larger than the sum of its proper divisors (1).

131869501 is an equidigital number, since it uses as much as digits as its factorization.

131869501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 131869501 is about 11483.4446487106. Note that the first 3 decimals coincide. The cubic root of 131869501 is about 508.9964901340.

The spelling of 131869501 in words is "one hundred thirty-one million, eight hundred sixty-nine thousand, five hundred one".