87634871 has 2 divisors, whose sum is σ = 87634872. Its totient is φ = 87634870.

The previous prime is 87634867. The next prime is 87634873. The reversal of 87634871 is 17843678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87634871 - 2² = 87634867 is a prime.

Together with 87634873, 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 (87634873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43817435 + 43817436.

It is an arithmetic number, because the mean of its divisors is an integer number (43817436).

Almost surely, 2^87634871 is an apocalyptic number.

87634871 is a deficient number, since it is larger than the sum of its proper divisors (1).

87634871 is an equidigital number, since it uses as much as digits as its factorization.

87634871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 87634871 is about 9361.3498492472. The cubic root of 87634871 is about 444.1799837763.

The spelling of 87634871 in words is "eighty-seven million, six hundred thirty-four thousand, eight hundred seventy-one".