287056157 has 2 divisors, whose sum is σ = 287056158. Its totient is φ = 287056156.

The previous prime is 287056141. The next prime is 287056163. The reversal of 287056157 is 751650782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182628196 + 104427961 = 13514^2 + 10219^2 .

It is a cyclic number.

It is not a de Polignac number, because 287056157 - 2⁴ = 287056141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287056117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143528078 + 143528079.

It is an arithmetic number, because the mean of its divisors is an integer number (143528079).

Almost surely, 2^287056157 is an apocalyptic number.

It is an amenable number.

287056157 is a deficient number, since it is larger than the sum of its proper divisors (1).

287056157 is an equidigital number, since it uses as much as digits as its factorization.

287056157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 287056157 is about 16942.7316864784. The cubic root of 287056157 is about 659.6632480123.

The spelling of 287056157 in words is "two hundred eighty-seven million, fifty-six thousand, one hundred fifty-seven".