285957157 has 2 divisors, whose sum is σ = 285957158. Its totient is φ = 285957156.

The previous prime is 285957143. The next prime is 285957167. The reversal of 285957157 is 751759582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271623361 + 14333796 = 16481^2 + 3786^2 .

It is a cyclic number.

It is not a de Polignac number, because 285957157 - 2¹⁹ = 285432869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285957157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285957107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142978578 + 142978579.

It is an arithmetic number, because the mean of its divisors is an integer number (142978579).

Almost surely, 2^285957157 is an apocalyptic number.

It is an amenable number.

285957157 is a deficient number, since it is larger than the sum of its proper divisors (1).

285957157 is an equidigital number, since it uses as much as digits as its factorization.

285957157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882000, while the sum is 49.

The square root of 285957157 is about 16910.2677979978. The cubic root of 285957157 is about 658.8203269185.

The spelling of 285957157 in words is "two hundred eighty-five million, nine hundred fifty-seven thousand, one hundred fifty-seven".