68613549 has 4 divisors (see below), whose sum is σ = 91484736. Its totient is φ = 45742364.

The previous prime is 68613539. The next prime is 68613563. The reversal of 68613549 is 94531686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68613549 - 2⁷ = 68613421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68613549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68613539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11435589 + ... + 11435594.

It is an arithmetic number, because the mean of its divisors is an integer number (22871184).

Almost surely, 2^68613549 is an apocalyptic number.

It is an amenable number.

68613549 is a deficient number, since it is larger than the sum of its proper divisors (22871187).

68613549 is a wasteful number, since it uses less digits than its factorization.

68613549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22871186.

The product of its digits is 155520, while the sum is 42.

The square root of 68613549 is about 8283.3295841708. The cubic root of 68613549 is about 409.3894322671.

The spelling of 68613549 in words is "sixty-eight million, six hundred thirteen thousand, five hundred forty-nine".