131115493 has 2 divisors, whose sum is σ = 131115494. Its totient is φ = 131115492.

The previous prime is 131115463. The next prime is 131115511. The reversal of 131115493 is 394511131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130370724 + 744769 = 11418^2 + 863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131115493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131115463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65557746 + 65557747.

It is an arithmetic number, because the mean of its divisors is an integer number (65557747).

Almost surely, 2^131115493 is an apocalyptic number.

It is an amenable number.

131115493 is a deficient number, since it is larger than the sum of its proper divisors (1).

131115493 is an equidigital number, since it uses as much as digits as its factorization.

131115493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 28.

The square root of 131115493 is about 11450.5673658557. The cubic root of 131115493 is about 508.0245159909.

The spelling of 131115493 in words is "one hundred thirty-one million, one hundred fifteen thousand, four hundred ninety-three".