131030857 has 2 divisors, whose sum is σ = 131030858. Its totient is φ = 131030856.

The previous prime is 131030843. The next prime is 131030863. The reversal of 131030857 is 758030131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68873401 + 62157456 = 8299^2 + 7884^2 .

It is an emirp because it is prime and its reverse (758030131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131030857 - 2¹⁵ = 130998089 is a prime.

It is not a weakly prime, because it can be changed into another prime (131030827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65515428 + 65515429.

It is an arithmetic number, because the mean of its divisors is an integer number (65515429).

Almost surely, 2^131030857 is an apocalyptic number.

It is an amenable number.

131030857 is a deficient number, since it is larger than the sum of its proper divisors (1).

131030857 is an equidigital number, since it uses as much as digits as its factorization.

131030857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 131030857 is about 11446.8710571929. The cubic root of 131030857 is about 507.9151812943.

Adding to 131030857 its reverse (758030131), we get a palindrome (889060988).

The spelling of 131030857 in words is "one hundred thirty-one million, thirty thousand, eight hundred fifty-seven".