285100139 has 2 divisors, whose sum is σ = 285100140. Its totient is φ = 285100138.

The previous prime is 285100093. The next prime is 285100163. The reversal of 285100139 is 931001582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285100139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (285100199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142550069 + 142550070.

It is an arithmetic number, because the mean of its divisors is an integer number (142550070).

Almost surely, 2^285100139 is an apocalyptic number.

285100139 is a deficient number, since it is larger than the sum of its proper divisors (1).

285100139 is an equidigital number, since it uses as much as digits as its factorization.

285100139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 285100139 is about 16884.9086168685. The cubic root of 285100139 is about 658.1615034254.

The spelling of 285100139 in words is "two hundred eighty-five million, one hundred thousand, one hundred thirty-nine".