131778833 has 2 divisors, whose sum is σ = 131778834. Its totient is φ = 131778832.

The previous prime is 131778827. The next prime is 131778839. The reversal of 131778833 is 338877131.

It is a balanced prime because it is at equal distance from previous prime (131778827) and next prime (131778839).

It can be written as a sum of positive squares in only one way, i.e., 116467264 + 15311569 = 10792^2 + 3913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131778833 is a prime.

It is a nialpdrome in base 8.

It is not a weakly prime, because it can be changed into another prime (131778839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65889416 + 65889417.

It is an arithmetic number, because the mean of its divisors is an integer number (65889417).

Almost surely, 2^131778833 is an apocalyptic number.

It is an amenable number.

131778833 is a deficient number, since it is larger than the sum of its proper divisors (1).

131778833 is an equidigital number, since it uses as much as digits as its factorization.

131778833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 131778833 is about 11479.4961997467. The cubic root of 131778833 is about 508.8798084289.

The spelling of 131778833 in words is "one hundred thirty-one million, seven hundred seventy-eight thousand, eight hundred thirty-three".