68672529 has 14 divisors (see below), whose sum is σ = 102962786. Its totient is φ = 45781200.

The previous prime is 68672509. The next prime is 68672561. The reversal of 68672529 is 92527686.

68672529 is a `hidden beast` number, since 68 + 67 + 2 + 529 = 666.

It can be written as a sum of positive squares in only one way, i.e., 66048129 + 2624400 = 8127^2 + 1620^2 .

It is not a de Polignac number, because 68672529 - 2⁹ = 68672017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68672509) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 46372 + ... + 47829.

Almost surely, 2^68672529 is an apocalyptic number.

It is an amenable number.

68672529 is a deficient number, since it is larger than the sum of its proper divisors (34290257).

68672529 is an frugal number, since it uses more digits than its factorization.

68672529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94219 (or 94204 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 68672529 is about 8286.8889820004. Note that the first 3 decimals coincide. The cubic root of 68672529 is about 409.5067019794.

The spelling of 68672529 in words is "sixty-eight million, six hundred seventy-two thousand, five hundred twenty-nine".