87912047 has 2 divisors, whose sum is σ = 87912048. Its totient is φ = 87912046.

The previous prime is 87912029. The next prime is 87912059. The reversal of 87912047 is 74021978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87912047 - 2⁶ = 87911983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87912047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87912007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43956023 + 43956024.

It is an arithmetic number, because the mean of its divisors is an integer number (43956024).

Almost surely, 2^87912047 is an apocalyptic number.

87912047 is a deficient number, since it is larger than the sum of its proper divisors (1).

87912047 is an equidigital number, since it uses as much as digits as its factorization.

87912047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 87912047 is about 9376.1424370580. The cubic root of 87912047 is about 444.6477825652.

The spelling of 87912047 in words is "eighty-seven million, nine hundred twelve thousand, forty-seven".