721089654743 has 4 divisors (see below), whose sum is σ = 721103431608. Its totient is φ = 721075877880.

The previous prime is 721089654661. The next prime is 721089654763. The reversal of 721089654743 is 347456980127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 721089654743 - 2¹⁴ = 721089638359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721089654763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6809621 + ... + 6914702.

It is an arithmetic number, because the mean of its divisors is an integer number (180275857902).

It is a 1-persistent number, because it is pandigital, but 2⋅721089654743 = 1442179309486 is not.

Almost surely, 2^721089654743 is an apocalyptic number.

721089654743 is a deficient number, since it is larger than the sum of its proper divisors (13776865).

721089654743 is a wasteful number, since it uses less digits than its factorization.

721089654743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13776864.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 721089654743 in words is "seven hundred twenty-one billion, eighty-nine million, six hundred fifty-four thousand, seven hundred forty-three".