754729009 has 4 divisors (see below), whose sum is σ = 758639716. Its totient is φ = 750818304.

The previous prime is 754728983. The next prime is 754729057. The reversal of 754729009 is 900927457.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186049600 + 568679409 = 13640^2 + 23847^2 .

It is a cyclic number.

It is not a de Polignac number, because 754729009 - 2⁹ = 754728497 is a prime.

It is a super-2 number, since 2×754729009² = 1139231754052244162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (754729099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955064 + ... + 1955449.

It is an arithmetic number, because the mean of its divisors is an integer number (189659929).

Almost surely, 2^754729009 is an apocalyptic number.

It is an amenable number.

754729009 is a deficient number, since it is larger than the sum of its proper divisors (3910707).

754729009 is a wasteful number, since it uses less digits than its factorization.

754729009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910706.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 754729009 is about 27472.3316993662. The cubic root of 754729009 is about 910.4658923386.

The spelling of 754729009 in words is "seven hundred fifty-four million, seven hundred twenty-nine thousand, nine".