68384749 has 4 divisors (see below), whose sum is σ = 69975136. Its totient is φ = 66794364.

The previous prime is 68384737. The next prime is 68384759. The reversal of 68384749 is 94748386.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94748386 = 2 ⋅47374193.

It is a cyclic number.

It is not a de Polignac number, because 68384749 - 2⁹ = 68384237 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 (68384759) 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, 795129 + ... + 795214.

It is an arithmetic number, because the mean of its divisors is an integer number (17493784).

Almost surely, 2^68384749 is an apocalyptic number.

It is an amenable number.

68384749 is a deficient number, since it is larger than the sum of its proper divisors (1590387).

68384749 is a wasteful number, since it uses less digits than its factorization.

68384749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590386.

The product of its digits is 1161216, while the sum is 49.

The square root of 68384749 is about 8269.5071799957. The cubic root of 68384749 is about 408.9338730139.

The spelling of 68384749 in words is "sixty-eight million, three hundred eighty-four thousand, seven hundred forty-nine".