68491012 has 6 divisors (see below), whose sum is σ = 119859278. Its totient is φ = 34245504.

The previous prime is 68490971. The next prime is 68491013. The reversal of 68491012 is 21019486.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68161536 + 329476 = 8256^2 + 574^2 .

It is not an unprimeable number, because it can be changed into a prime (68491013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8561373 + ... + 8561380.

Almost surely, 2^68491012 is an apocalyptic number.

It is an amenable number.

68491012 is a deficient number, since it is larger than the sum of its proper divisors (51368266).

68491012 is a wasteful number, since it uses less digits than its factorization.

68491012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17122757 (or 17122755 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 68491012 is about 8275.9296758733. The cubic root of 68491012 is about 409.1455773885.

The spelling of 68491012 in words is "sixty-eight million, four hundred ninety-one thousand, twelve".