287604191131 has 2 divisors, whose sum is σ = 287604191132. Its totient is φ = 287604191130.

The previous prime is 287604191111. The next prime is 287604191177. The reversal of 287604191131 is 131191406782.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 287604191131 - 2²⁵ = 287570636699 is a prime.

It is a super-2 number, since 2×287604191131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (287604191101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143802095565 + 143802095566.

It is an arithmetic number, because the mean of its divisors is an integer number (143802095566).

Almost surely, 2^287604191131 is an apocalyptic number.

287604191131 is a deficient number, since it is larger than the sum of its proper divisors (1).

287604191131 is an equidigital number, since it uses as much as digits as its factorization.

287604191131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 287604191131 in words is "two hundred eighty-seven billion, six hundred four million, one hundred ninety-one thousand, one hundred thirty-one".