287905967 has 4 divisors (see below), whose sum is σ = 288522936. Its totient is φ = 287289000.

The previous prime is 287905963. The next prime is 287905979. The reversal of 287905967 is 769509782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 769509782 = 2 ⋅384754891.

It is a cyclic number.

It is not a de Polignac number, because 287905967 - 2² = 287905963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287905963) 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 in 3 ways as a sum of consecutive naturals, for example, 307784 + ... + 308717.

It is an arithmetic number, because the mean of its divisors is an integer number (72130734).

Almost surely, 2^287905967 is an apocalyptic number.

287905967 is a deficient number, since it is larger than the sum of its proper divisors (616969).

287905967 is an equidigital number, since it uses as much as digits as its factorization.

287905967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616968.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 287905967 is about 16967.7920484664. The cubic root of 287905967 is about 660.3135692412.

The spelling of 287905967 in words is "two hundred eighty-seven million, nine hundred five thousand, nine hundred sixty-seven".