719369721 has 16 divisors (see below), whose sum is σ = 1217980800. Its totient is φ = 411068304.

The previous prime is 719369719. The next prime is 719369741. The reversal of 719369721 is 127963917.

It is not a de Polignac number, because 719369721 - 2¹ = 719369719 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (719369711) 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, 1902906 + ... + 1903283.

It is an arithmetic number, because the mean of its divisors is an integer number (76123800).

Almost surely, 2^719369721 is an apocalyptic number.

It is an amenable number.

719369721 is a deficient number, since it is larger than the sum of its proper divisors (498611079).

719369721 is a wasteful number, since it uses less digits than its factorization.

719369721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806205 (or 3806199 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 719369721 is about 26821.0686028726. The cubic root of 719369721 is about 896.0193419141.

The spelling of 719369721 in words is "seven hundred nineteen million, three hundred sixty-nine thousand, seven hundred twenty-one".