1068397981 has 16 divisors (see below), whose sum is σ = 1281092608. Its totient is φ = 871689600.

The previous prime is 1068397921. The next prime is 1068397999. The reversal of 1068397981 is 1897938601.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1068397981 - 2¹³ = 1068389789 is a prime.

It is a super-2 number, since 2×1068397981² = 2282948491609752722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068397921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27120 + ... + 53593.

It is an arithmetic number, because the mean of its divisors is an integer number (80068288).

Almost surely, 2^1068397981 is an apocalyptic number.

It is an amenable number.

1068397981 is a deficient number, since it is larger than the sum of its proper divisors (212694627).

1068397981 is an equidigital number, since it uses as much as digits as its factorization.

1068397981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80812.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 1068397981 is about 32686.3577200030. The cubic root of 1068397981 is about 1022.2984120857.

The spelling of 1068397981 in words is "one billion, sixty-eight million, three hundred ninety-seven thousand, nine hundred eighty-one".