87429871 has 2 divisors, whose sum is σ = 87429872. Its totient is φ = 87429870.

The previous prime is 87429869. The next prime is 87429893. The reversal of 87429871 is 17892478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87429871 - 2¹ = 87429869 is a prime.

Together with 87429869, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87429821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43714935 + 43714936.

It is an arithmetic number, because the mean of its divisors is an integer number (43714936).

Almost surely, 2^87429871 is an apocalyptic number.

87429871 is a deficient number, since it is larger than the sum of its proper divisors (1).

87429871 is an equidigital number, since it uses as much as digits as its factorization.

87429871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 87429871 is about 9350.3941628147. The cubic root of 87429871 is about 443.8333637999.

The spelling of 87429871 in words is "eighty-seven million, four hundred twenty-nine thousand, eight hundred seventy-one".