87047921827 has 2 divisors, whose sum is σ = 87047921828. Its totient is φ = 87047921826.

The previous prime is 87047921803. The next prime is 87047921861. The reversal of 87047921827 is 72812974078.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87047921827 is a prime.

It is not a weakly prime, because it can be changed into another prime (87047921897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43523960913 + 43523960914.

It is an arithmetic number, because the mean of its divisors is an integer number (43523960914).

Almost surely, 2^87047921827 is an apocalyptic number.

87047921827 is a deficient number, since it is larger than the sum of its proper divisors (1).

87047921827 is an equidigital number, since it uses as much as digits as its factorization.

87047921827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The spelling of 87047921827 in words is "eighty-seven billion, forty-seven million, nine hundred twenty-one thousand, eight hundred twenty-seven".