285115847 has 2 divisors, whose sum is σ = 285115848. Its totient is φ = 285115846.

The previous prime is 285115813. The next prime is 285115871. The reversal of 285115847 is 748511582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285115847 - 2⁶ = 285115783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285115247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142557923 + 142557924.

It is an arithmetic number, because the mean of its divisors is an integer number (142557924).

Almost surely, 2^285115847 is an apocalyptic number.

285115847 is a deficient number, since it is larger than the sum of its proper divisors (1).

285115847 is an equidigital number, since it uses as much as digits as its factorization.

285115847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 41.

The square root of 285115847 is about 16885.3737595589. The cubic root of 285115847 is about 658.1735906533.

The spelling of 285115847 in words is "two hundred eighty-five million, one hundred fifteen thousand, eight hundred forty-seven".