87031429 has 2 divisors, whose sum is σ = 87031430. Its totient is φ = 87031428.

The previous prime is 87031423. The next prime is 87031447. The reversal of 87031429 is 92413078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81414529 + 5616900 = 9023^2 + 2370^2 .

It is a cyclic number.

It is not a de Polignac number, because 87031429 - 2¹¹ = 87029381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87031394 and 87031403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87031423) 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, 43515714 + 43515715.

It is an arithmetic number, because the mean of its divisors is an integer number (43515715).

Almost surely, 2^87031429 is an apocalyptic number.

It is an amenable number.

87031429 is a deficient number, since it is larger than the sum of its proper divisors (1).

87031429 is an equidigital number, since it uses as much as digits as its factorization.

87031429 is an odious number, because the sum of its binary digits is odd.

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

The square root of 87031429 is about 9329.0636722021. The cubic root of 87031429 is about 443.1581133683.

The spelling of 87031429 in words is "eighty-seven million, thirty-one thousand, four hundred twenty-nine".