285625913 has 2 divisors, whose sum is σ = 285625914. Its totient is φ = 285625912.

The previous prime is 285625897. The next prime is 285625931. The reversal of 285625913 is 319526582.

Together with next prime (285625931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276457129 + 9168784 = 16627^2 + 3028^2 .

It is a cyclic number.

It is not a de Polignac number, because 285625913 - 2⁴ = 285625897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (285625933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142812956 + 142812957.

It is an arithmetic number, because the mean of its divisors is an integer number (142812957).

Almost surely, 2^285625913 is an apocalyptic number.

It is an amenable number.

285625913 is a deficient number, since it is larger than the sum of its proper divisors (1).

285625913 is an equidigital number, since it uses as much as digits as its factorization.

285625913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 285625913 is about 16900.4707922590. The cubic root of 285625913 is about 658.5658428777.

The spelling of 285625913 in words is "two hundred eighty-five million, six hundred twenty-five thousand, nine hundred thirteen".