87895190891 has 2 divisors, whose sum is σ = 87895190892. Its totient is φ = 87895190890.

The previous prime is 87895190881. The next prime is 87895190927. The reversal of 87895190891 is 19809159878.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87895190891 is a prime.

It is not a weakly prime, because it can be changed into another prime (87895190881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43947595445 + 43947595446.

It is an arithmetic number, because the mean of its divisors is an integer number (43947595446).

Almost surely, 2^87895190891 is an apocalyptic number.

87895190891 is a deficient number, since it is larger than the sum of its proper divisors (1).

87895190891 is an equidigital number, since it uses as much as digits as its factorization.

87895190891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 65.

The spelling of 87895190891 in words is "eighty-seven billion, eight hundred ninety-five million, one hundred ninety thousand, eight hundred ninety-one".