285071387 has 2 divisors, whose sum is σ = 285071388. Its totient is φ = 285071386.

The previous prime is 285071377. The next prime is 285071417. The reversal of 285071387 is 783170582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285071387 - 2¹⁴ = 285055003 is a prime.

It is a super-2 number, since 2×285071387² = 162531391372207538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (285071377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142535693 + 142535694.

It is an arithmetic number, because the mean of its divisors is an integer number (142535694).

Almost surely, 2^285071387 is an apocalyptic number.

285071387 is a deficient number, since it is larger than the sum of its proper divisors (1).

285071387 is an equidigital number, since it uses as much as digits as its factorization.

285071387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 285071387 is about 16884.0571842197. The cubic root of 285071387 is about 658.1393777543.

The spelling of 285071387 in words is "two hundred eighty-five million, seventy-one thousand, three hundred eighty-seven".