754768721 has 8 divisors (see below), whose sum is σ = 862859904. Its totient is φ = 646744320.

The previous prime is 754768603. The next prime is 754768739. The reversal of 754768721 is 127867457.

It is a happy number.

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-754768721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (754768321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10481 + ... + 40241.

It is an arithmetic number, because the mean of its divisors is an integer number (107857488).

Almost surely, 2^754768721 is an apocalyptic number.

It is an amenable number.

754768721 is a deficient number, since it is larger than the sum of its proper divisors (108091183).

754768721 is a wasteful number, since it uses less digits than its factorization.

754768721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33391.

The product of its digits is 658560, while the sum is 47.

The square root of 754768721 is about 27473.0544534094. The cubic root of 754768721 is about 910.4818608902.

The spelling of 754768721 in words is "seven hundred fifty-four million, seven hundred sixty-eight thousand, seven hundred twenty-one".