709740521 has 8 divisors (see below), whose sum is σ = 811838784. Its totient is φ = 607818960.

The previous prime is 709740517. The next prime is 709740541. The reversal of 709740521 is 125047907.

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

It is not a de Polignac number, because 709740521 - 2² = 709740517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709740541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35450 + ... + 51731.

It is an arithmetic number, because the mean of its divisors is an integer number (101479848).

Almost surely, 2^709740521 is an apocalyptic number.

It is an amenable number.

709740521 is a deficient number, since it is larger than the sum of its proper divisors (102098263).

709740521 is a wasteful number, since it uses less digits than its factorization.

709740521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88351.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 709740521 is about 26640.9557073315. The cubic root of 709740521 is about 892.0034490975.

The spelling of 709740521 in words is "seven hundred nine million, seven hundred forty thousand, five hundred twenty-one".