87487481131 has 2 divisors, whose sum is σ = 87487481132. Its totient is φ = 87487481130.

The previous prime is 87487481113. The next prime is 87487481173. The reversal of 87487481131 is 13118478478.

Together with previous prime (87487481113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87487481131 is a prime.

It is a super-2 number, since 2×87487481131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87487431131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43743740565 + 43743740566.

It is an arithmetic number, because the mean of its divisors is an integer number (43743740566).

Almost surely, 2^87487481131 is an apocalyptic number.

87487481131 is a deficient number, since it is larger than the sum of its proper divisors (1).

87487481131 is an equidigital number, since it uses as much as digits as its factorization.

87487481131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1204224, while the sum is 52.

The spelling of 87487481131 in words is "eighty-seven billion, four hundred eighty-seven million, four hundred eighty-one thousand, one hundred thirty-one".