131631847 has 2 divisors, whose sum is σ = 131631848. Its totient is φ = 131631846.

The previous prime is 131631823. The next prime is 131631869. The reversal of 131631847 is 748136131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131631847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131631547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65815923 + 65815924.

It is an arithmetic number, because the mean of its divisors is an integer number (65815924).

Almost surely, 2^131631847 is an apocalyptic number.

131631847 is a deficient number, since it is larger than the sum of its proper divisors (1).

131631847 is an equidigital number, since it uses as much as digits as its factorization.

131631847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 131631847 is about 11473.0923032982. The cubic root of 131631847 is about 508.6905366695.

Adding to 131631847 its reverse (748136131), we get a palindrome (879767978).

The spelling of 131631847 in words is "one hundred thirty-one million, six hundred thirty-one thousand, eight hundred forty-seven".