131742731 has 2 divisors, whose sum is σ = 131742732. Its totient is φ = 131742730.

The previous prime is 131742727. The next prime is 131742757. The reversal of 131742731 is 137247131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131742731 - 2² = 131742727 is a prime.

It is a super-2 number, since 2×131742731² = 34712294342676722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131742694 and 131742703.

It is not a weakly prime, because it can be changed into another prime (131742791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65871365 + 65871366.

It is an arithmetic number, because the mean of its divisors is an integer number (65871366).

Almost surely, 2^131742731 is an apocalyptic number.

131742731 is a deficient number, since it is larger than the sum of its proper divisors (1).

131742731 is an equidigital number, since it uses as much as digits as its factorization.

131742731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 131742731 is about 11477.9236362680. The cubic root of 131742731 is about 508.8333334466.

Adding to 131742731 its reverse (137247131), we get a palindrome (268989862).

The spelling of 131742731 in words is "one hundred thirty-one million, seven hundred forty-two thousand, seven hundred thirty-one".