1068897637 has 4 divisors (see below), whose sum is σ = 1068998476. Its totient is φ = 1068796800.

The previous prime is 1068897619. The next prime is 1068897647. The reversal of 1068897637 is 7367988601.

It is a Cunningham number, because it is equal to 32694²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8678916 + 1060218721 = 2946^2 + 32561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1068897637 - 2²³ = 1060509029 is a prime.

It is a super-2 number, since 2×1068897637² = 2285084316768367538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068897647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32364 + ... + 56437.

It is an arithmetic number, because the mean of its divisors is an integer number (267249619).

Almost surely, 2^1068897637 is an apocalyptic number.

It is an amenable number.

1068897637 is a deficient number, since it is larger than the sum of its proper divisors (100839).

1068897637 is an equidigital number, since it uses as much as digits as its factorization.

1068897637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100838.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 1068897637 is about 32694.0000152933. Note that the first 4 decimals coincide. The cubic root of 1068897637 is about 1022.4577528112.

The spelling of 1068897637 in words is "one billion, sixty-eight million, eight hundred ninety-seven thousand, six hundred thirty-seven".