68732613 has 6 divisors (see below), whose sum is σ = 99280454. Its totient is φ = 45821736.

The previous prime is 68732597. The next prime is 68732623. The reversal of 68732613 is 31623786.

It is a happy number.

68732613 is a `hidden beast` number, since 6 + 8 + 7 + 32 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 68260644 + 471969 = 8262^2 + 687^2 .

It is not a de Polignac number, because 68732613 - 2⁴ = 68732597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68732623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3818470 + ... + 3818487.

Almost surely, 2^68732613 is an apocalyptic number.

It is an amenable number.

68732613 is a deficient number, since it is larger than the sum of its proper divisors (30547841).

68732613 is a wasteful number, since it uses less digits than its factorization.

68732613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7636963 (or 7636960 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 68732613 is about 8290.5134340401. The cubic root of 68732613 is about 409.6260977488.

The spelling of 68732613 in words is "sixty-eight million, seven hundred thirty-two thousand, six hundred thirteen".