719481721 has 16 divisors (see below), whose sum is σ = 869391360. Its totient is φ = 581642640.

The previous prime is 719481713. The next prime is 719481733. The reversal of 719481721 is 127184917.

It is a cyclic number.

It is not a de Polignac number, because 719481721 - 2³ = 719481713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (719481221) 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 15 ways as a sum of consecutive naturals, for example, 18276 + ... + 42106.

It is an arithmetic number, because the mean of its divisors is an integer number (54336960).

Almost surely, 2^719481721 is an apocalyptic number.

It is an amenable number.

719481721 is a deficient number, since it is larger than the sum of its proper divisors (149909639).

719481721 is a wasteful number, since it uses less digits than its factorization.

719481721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24084.

The product of its digits is 28224, while the sum is 40.

The square root of 719481721 is about 26823.1564324559. The cubic root of 719481721 is about 896.0658404696.

The spelling of 719481721 in words is "seven hundred nineteen million, four hundred eighty-one thousand, seven hundred twenty-one".