287496991 has 2 divisors, whose sum is σ = 287496992. Its totient is φ = 287496990.

The previous prime is 287496971. The next prime is 287497009. The reversal of 287496991 is 199694782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 287496991 - 2⁷ = 287496863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287496901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143748495 + 143748496.

It is an arithmetic number, because the mean of its divisors is an integer number (143748496).

Almost surely, 2^287496991 is an apocalyptic number.

287496991 is a deficient number, since it is larger than the sum of its proper divisors (1).

287496991 is an equidigital number, since it uses as much as digits as its factorization.

287496991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 287496991 is about 16955.7362270118. The cubic root of 287496991 is about 660.0007583401. Note that the first 3 decimals are identical.

The spelling of 287496991 in words is "two hundred eighty-seven million, four hundred ninety-six thousand, nine hundred ninety-one".