287137997 has 2 divisors, whose sum is σ = 287137998. Its totient is φ = 287137996.

The previous prime is 287137969. The next prime is 287138023. The reversal of 287137997 is 799731782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146264836 + 140873161 = 12094^2 + 11869^2 .

It is a cyclic number.

It is not a de Polignac number, because 287137997 - 2⁶ = 287137933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287137597) 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, 143568998 + 143568999.

It is an arithmetic number, because the mean of its divisors is an integer number (143568999).

Almost surely, 2^287137997 is an apocalyptic number.

It is an amenable number.

287137997 is a deficient number, since it is larger than the sum of its proper divisors (1).

287137997 is an equidigital number, since it uses as much as digits as its factorization.

287137997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 53.

The square root of 287137997 is about 16945.1467093088. The cubic root of 287137997 is about 659.7259322747.

The spelling of 287137997 in words is "two hundred eighty-seven million, one hundred thirty-seven thousand, nine hundred ninety-seven".