1068215913 has 6 divisors (see below), whose sum is σ = 1542978554. Its totient is φ = 712143936.

The previous prime is 1068215909. The next prime is 1068215917. The reversal of 1068215913 is 3195128601.

1068215913 is a `hidden beast` number, since 1 + 0 + 68 + 2 + 1 + 591 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1068215909) and next prime (1068215917).

It can be written as a sum of positive squares in only one way, i.e., 621654489 + 446561424 = 24933^2 + 21132^2 .

It is not a de Polignac number, because 1068215913 - 2² = 1068215909 is a prime.

It is a super-2 number, since 2×1068215913² = 2282170473572847138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1068215917) 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, 59345320 + ... + 59345337.

Almost surely, 2^1068215913 is an apocalyptic number.

It is an amenable number.

1068215913 is a deficient number, since it is larger than the sum of its proper divisors (474762641).

1068215913 is a wasteful number, since it uses less digits than its factorization.

1068215913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118690663 (or 118690660 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1068215913 is about 32683.5725250469. The cubic root of 1068215913 is about 1022.2403380957.

The spelling of 1068215913 in words is "one billion, sixty-eight million, two hundred fifteen thousand, nine hundred thirteen".