1068256987 has 6 divisors (see below), whose sum is σ = 1242666348. Its totient is φ = 915648804.

The previous prime is 1068256951. The next prime is 1068256991. The reversal of 1068256987 is 7896528601.

It is a de Polignac number, because none of the positive numbers 2^k-1068256987 is a prime.

It is a super-2 number, since 2×1068256987² = 2282345980548636338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1068256907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10900533 + ... + 10900630.

It is an arithmetic number, because the mean of its divisors is an integer number (207111058).

Almost surely, 2^1068256987 is an apocalyptic number.

1068256987 is a deficient number, since it is larger than the sum of its proper divisors (174409361).

1068256987 is an equidigital number, since it uses as much as digits as its factorization.

1068256987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21801177 (or 21801170 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The square root of 1068256987 is about 32684.2008774882. The cubic root of 1068256987 is about 1022.2534399917.

The spelling of 1068256987 in words is "one billion, sixty-eight million, two hundred fifty-six thousand, nine hundred eighty-seven".