68944729 has 4 divisors (see below), whose sum is σ = 78793984. Its totient is φ = 59095476.

The previous prime is 68944717. The next prime is 68944751. The reversal of 68944729 is 92744986.

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: 92744986 = 2 ⋅46372493.

It is a cyclic number.

It is not a de Polignac number, because 68944729 - 2²¹ = 66847577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68944709) 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, 4924617 + ... + 4924630.

It is an arithmetic number, because the mean of its divisors is an integer number (19698496).

Almost surely, 2^68944729 is an apocalyptic number.

It is an amenable number.

68944729 is a deficient number, since it is larger than the sum of its proper divisors (9849255).

68944729 is an equidigital number, since it uses as much as digits as its factorization.

68944729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9849254.

The product of its digits is 870912, while the sum is 49.

The square root of 68944729 is about 8303.2962731677. The cubic root of 68944729 is about 410.0470479423.

The spelling of 68944729 in words is "sixty-eight million, nine hundred forty-four thousand, seven hundred twenty-nine".