735406721 has 4 divisors (see below), whose sum is σ = 840464832. Its totient is φ = 630348612.

The previous prime is 735406717. The next prime is 735406741. The reversal of 735406721 is 127604537.

735406721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 735406721 - 2² = 735406717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (735406741) 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, 52529045 + ... + 52529058.

It is an arithmetic number, because the mean of its divisors is an integer number (210116208).

Almost surely, 2^735406721 is an apocalyptic number.

It is an amenable number.

735406721 is a deficient number, since it is larger than the sum of its proper divisors (105058111).

735406721 is a wasteful number, since it uses less digits than its factorization.

735406721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105058110.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 735406721 is about 27118.3834510835. The cubic root of 735406721 is about 902.6288246467.

The spelling of 735406721 in words is "seven hundred thirty-five million, four hundred six thousand, seven hundred twenty-one".