285655399 has 2 divisors, whose sum is σ = 285655400. Its totient is φ = 285655398.

The previous prime is 285655361. The next prime is 285655417. The reversal of 285655399 is 993556582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285655399 - 2¹³ = 285647207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285655309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142827699 + 142827700.

It is an arithmetic number, because the mean of its divisors is an integer number (142827700).

Almost surely, 2^285655399 is an apocalyptic number.

285655399 is a deficient number, since it is larger than the sum of its proper divisors (1).

285655399 is an equidigital number, since it uses as much as digits as its factorization.

285655399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 52.

The square root of 285655399 is about 16901.3431123092. The cubic root of 285655399 is about 658.5885039919.

The spelling of 285655399 in words is "two hundred eighty-five million, six hundred fifty-five thousand, three hundred ninety-nine".