721713355 has 8 divisors (see below), whose sum is σ = 944788464. Its totient is φ = 524882400.

The previous prime is 721713353. The next prime is 721713361. The reversal of 721713355 is 553317127.

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

It is not a de Polignac number, because 721713355 - 2¹ = 721713353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 721713355.

It is not an unprimeable number, because it can be changed into a prime (721713353) 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, 6560976 + ... + 6561085.

It is an arithmetic number, because the mean of its divisors is an integer number (118098558).

Almost surely, 2^721713355 is an apocalyptic number.

721713355 is a deficient number, since it is larger than the sum of its proper divisors (223075109).

721713355 is a wasteful number, since it uses less digits than its factorization.

721713355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13122077.

The product of its digits is 22050, while the sum is 34.

The square root of 721713355 is about 26864.7232444334. The cubic root of 721713355 is about 896.9913340094.

The spelling of 721713355 in words is "seven hundred twenty-one million, seven hundred thirteen thousand, three hundred fifty-five".