286949881 has 2 divisors, whose sum is σ = 286949882. Its totient is φ = 286949880.

The previous prime is 286949849. The next prime is 286949893. The reversal of 286949881 is 188949682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161061481 + 125888400 = 12691^2 + 11220^2 .

It is a cyclic number.

It is not a de Polignac number, because 286949881 - 2⁵ = 286949849 is a prime.

It is a super-2 number, since 2×286949881² = 164680468411828322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (286949801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143474940 + 143474941.

It is an arithmetic number, because the mean of its divisors is an integer number (143474941).

Almost surely, 2^286949881 is an apocalyptic number.

It is an amenable number.

286949881 is a deficient number, since it is larger than the sum of its proper divisors (1).

286949881 is an equidigital number, since it uses as much as digits as its factorization.

286949881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 55.

The square root of 286949881 is about 16939.5950659985. The cubic root of 286949881 is about 659.5818295358.

The spelling of 286949881 in words is "two hundred eighty-six million, nine hundred forty-nine thousand, eight hundred eighty-one".