721701383 has 16 divisors (see below), whose sum is σ = 812070336. Its totient is φ = 636387840.

The previous prime is 721701373. The next prime is 721701397. The reversal of 721701383 is 383107127.

It is a cyclic number.

It is not a de Polignac number, because 721701383 - 2⁶ = 721701319 is a prime.

It is a super-2 number, since 2×721701383² = 1041705772448225378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721701373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386873 + ... + 388733.

It is an arithmetic number, because the mean of its divisors is an integer number (50754396).

Almost surely, 2^721701383 is an apocalyptic number.

721701383 is a deficient number, since it is larger than the sum of its proper divisors (90368953).

721701383 is a wasteful number, since it uses less digits than its factorization.

721701383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3194.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 721701383 is about 26864.5004234212. The cubic root of 721701383 is about 896.9863741272.

The spelling of 721701383 in words is "seven hundred twenty-one million, seven hundred one thousand, three hundred eighty-three".