131506783 has 2 divisors, whose sum is σ = 131506784. Its totient is φ = 131506782.

The previous prime is 131506751. The next prime is 131506787. The reversal of 131506783 is 387605131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131506783 - 2⁵ = 131506751 is a prime.

It is a super-4 number, since 4×131506783⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131506787) 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, 65753391 + 65753392.

It is an arithmetic number, because the mean of its divisors is an integer number (65753392).

Almost surely, 2^131506783 is an apocalyptic number.

131506783 is a deficient number, since it is larger than the sum of its proper divisors (1).

131506783 is an equidigital number, since it uses as much as digits as its factorization.

131506783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 131506783 is about 11467.6406902205. The cubic root of 131506783 is about 508.5293825781.

The spelling of 131506783 in words is "one hundred thirty-one million, five hundred six thousand, seven hundred eighty-three".