870081587 has 2 divisors, whose sum is σ = 870081588. Its totient is φ = 870081586.

The previous prime is 870081551. The next prime is 870081593. The reversal of 870081587 is 785180078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870081587 - 2¹⁸ = 869819443 is a prime.

It is not a weakly prime, because it can be changed into another prime (870081517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435040793 + 435040794.

It is an arithmetic number, because the mean of its divisors is an integer number (435040794).

Almost surely, 2^870081587 is an apocalyptic number.

870081587 is a deficient number, since it is larger than the sum of its proper divisors (1).

870081587 is an equidigital number, since it uses as much as digits as its factorization.

870081587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 870081587 is about 29497.1454042590. The cubic root of 870081587 is about 954.6701114729.

The spelling of 870081587 in words is "eight hundred seventy million, eighty-one thousand, five hundred eighty-seven".