68644741 has 4 divisors (see below), whose sum is σ = 74885184. Its totient is φ = 62404300.

The previous prime is 68644661. The next prime is 68644787. The reversal of 68644741 is 14744686.

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 68644741 - 2⁷ = 68644613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68644694 and 68644703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68644141) 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, 3120205 + ... + 3120226.

It is an arithmetic number, because the mean of its divisors is an integer number (18721296).

Almost surely, 2^68644741 is an apocalyptic number.

It is an amenable number.

68644741 is a deficient number, since it is larger than the sum of its proper divisors (6240443).

68644741 is a wasteful number, since it uses less digits than its factorization.

68644741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240442.

The product of its digits is 129024, while the sum is 40.

The square root of 68644741 is about 8285.2121879889. The cubic root of 68644741 is about 409.4514595721.

It can be divided in two parts, 68 and 644741, that added together give a square (644809 = 803²).

The spelling of 68644741 in words is "sixty-eight million, six hundred forty-four thousand, seven hundred forty-one".