131748857 has 2 divisors, whose sum is σ = 131748858. Its totient is φ = 131748856.

The previous prime is 131748839. The next prime is 131748863. The reversal of 131748857 is 758847131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105288121 + 26460736 = 10261^2 + 5144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131748857 is a prime.

It is a super-2 number, since 2×131748857² = 34715522641612898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131748887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65874428 + 65874429.

It is an arithmetic number, because the mean of its divisors is an integer number (65874429).

Almost surely, 2^131748857 is an apocalyptic number.

It is an amenable number.

131748857 is a deficient number, since it is larger than the sum of its proper divisors (1).

131748857 is an equidigital number, since it uses as much as digits as its factorization.

131748857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 44.

The square root of 131748857 is about 11478.1904932790. The cubic root of 131748857 is about 508.8412201934.

The spelling of 131748857 in words is "one hundred thirty-one million, seven hundred forty-eight thousand, eight hundred fifty-seven".