68613507 has 16 divisors (see below), whose sum is σ = 105156000. Its totient is φ = 44164512.

The previous prime is 68613499. The next prime is 68613521. The reversal of 68613507 is 70531686.

It is not a de Polignac number, because 68613507 - 2³ = 68613499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68613007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43032 + ... + 44597.

It is an arithmetic number, because the mean of its divisors is an integer number (6572250).

Almost surely, 2^68613507 is an apocalyptic number.

68613507 is a deficient number, since it is larger than the sum of its proper divisors (36542493).

68613507 is a wasteful number, since it uses less digits than its factorization.

68613507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87667 (or 87661 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 68613507 is about 8283.3270489580. The cubic root of 68613507 is about 409.3893487347.

The spelling of 68613507 in words is "sixty-eight million, six hundred thirteen thousand, five hundred seven".