68691044 has 6 divisors (see below), whose sum is σ = 120209334. Its totient is φ = 34345520.

The previous prime is 68691043. The next prime is 68691059. The reversal of 68691044 is 44019686.

It can be written as a sum of positive squares in only one way, i.e., 68690944 + 100 = 8288^2 + 10^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68690989 and 68691007.

It is not an unprimeable number, because it can be changed into a prime (68691043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8586377 + ... + 8586384.

It is an arithmetic number, because the mean of its divisors is an integer number (20034889).

Almost surely, 2^68691044 is an apocalyptic number.

It is an amenable number.

68691044 is a deficient number, since it is larger than the sum of its proper divisors (51518290).

68691044 is a wasteful number, since it uses less digits than its factorization.

68691044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17172765 (or 17172763 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 68691044 is about 8288.0060328163. The cubic root of 68691044 is about 409.5435014362.

The spelling of 68691044 in words is "sixty-eight million, six hundred ninety-one thousand, forty-four".