87039647 has 2 divisors, whose sum is σ = 87039648. Its totient is φ = 87039646.

The previous prime is 87039637. The next prime is 87039649. The reversal of 87039647 is 74693078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87039647 - 2⁶ = 87039583 is a prime.

Together with 87039649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87039598 and 87039607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87039649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43519823 + 43519824.

It is an arithmetic number, because the mean of its divisors is an integer number (43519824).

Almost surely, 2^87039647 is an apocalyptic number.

87039647 is a deficient number, since it is larger than the sum of its proper divisors (1).

87039647 is an equidigital number, since it uses as much as digits as its factorization.

87039647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 87039647 is about 9329.5041132956. The cubic root of 87039647 is about 443.1720614282.

The spelling of 87039647 in words is "eighty-seven million, thirty-nine thousand, six hundred forty-seven".