287967939971 has 2 divisors, whose sum is σ = 287967939972. Its totient is φ = 287967939970.

The previous prime is 287967939901. The next prime is 287967940019. The reversal of 287967939971 is 179939769782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287967939971 is a prime.

It is a super-2 number, since 2×287967939971² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 287967939892 and 287967939901.

It is not a weakly prime, because it can be changed into another prime (287967939901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143983969985 + 143983969986.

It is an arithmetic number, because the mean of its divisors is an integer number (143983969986).

Almost surely, 2^287967939971 is an apocalyptic number.

287967939971 is a deficient number, since it is larger than the sum of its proper divisors (1).

287967939971 is an equidigital number, since it uses as much as digits as its factorization.

287967939971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648121824, while the sum is 77.

The spelling of 287967939971 in words is "two hundred eighty-seven billion, nine hundred sixty-seven million, nine hundred thirty-nine thousand, nine hundred seventy-one".