68748649 has 4 divisors (see below), whose sum is σ = 69022800. Its totient is φ = 68474500.

The previous prime is 68748613. The next prime is 68748671. The reversal of 68748649 is 94684786.

It is a happy number.

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 68748649 - 2⁷ = 68748521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68748596 and 68748605.

It is not an unprimeable number, because it can be changed into a prime (68748949) 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, 136699 + ... + 137200.

It is an arithmetic number, because the mean of its divisors is an integer number (17255700).

Almost surely, 2^68748649 is an apocalyptic number.

It is an amenable number.

68748649 is a deficient number, since it is larger than the sum of its proper divisors (274151).

68748649 is a wasteful number, since it uses less digits than its factorization.

68748649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274150.

The product of its digits is 2322432, while the sum is 52.

The square root of 68748649 is about 8291.4805071230. The cubic root of 68748649 is about 409.6579518814.

The spelling of 68748649 in words is "sixty-eight million, seven hundred forty-eight thousand, six hundred forty-nine".