68740549 has 4 divisors (see below), whose sum is σ = 68842764. Its totient is φ = 68638336.

The previous prime is 68740541. The next prime is 68740591. The reversal of 68740549 is 94504786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94504786 = 2 ⋅47252393.

It can be written as a sum of positive squares in 2 ways, for example, as 66830625 + 1909924 = 8175^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 68740549 - 2³ = 68740541 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 (68740541) 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, 50092 + ... + 51445.

It is an arithmetic number, because the mean of its divisors is an integer number (17210691).

Almost surely, 2^68740549 is an apocalyptic number.

It is an amenable number.

68740549 is a deficient number, since it is larger than the sum of its proper divisors (102215).

68740549 is a wasteful number, since it uses less digits than its factorization.

68740549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102214.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 68740549 is about 8290.9920395571. The cubic root of 68740549 is about 409.6418625484.

The spelling of 68740549 in words is "sixty-eight million, seven hundred forty thousand, five hundred forty-nine".