75720329 has 8 divisors (see below), whose sum is σ = 80462880. Its totient is φ = 71009856.

The previous prime is 75720289. The next prime is 75720331. The reversal of 75720329 is 92302757.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75720329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75722329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3059 + ... + 12680.

It is an arithmetic number, because the mean of its divisors is an integer number (10057860).

Almost surely, 2^75720329 is an apocalyptic number.

It is an amenable number.

75720329 is a deficient number, since it is larger than the sum of its proper divisors (4742551).

75720329 is a wasteful number, since it uses less digits than its factorization.

75720329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16039.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 75720329 is about 8701.7428714023. The cubic root of 75720329 is about 423.0621421520.

The spelling of 75720329 in words is "seventy-five million, seven hundred twenty thousand, three hundred twenty-nine".