721094723 has 4 divisors (see below), whose sum is σ = 721168968. Its totient is φ = 721020480.

The previous prime is 721094719. The next prime is 721094741. The reversal of 721094723 is 327490127.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 721094723 - 2² = 721094719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721094753) 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, 19886 + ... + 42867.

It is an arithmetic number, because the mean of its divisors is an integer number (180292242).

Almost surely, 2^721094723 is an apocalyptic number.

721094723 is a deficient number, since it is larger than the sum of its proper divisors (74245).

721094723 is a wasteful number, since it uses less digits than its factorization.

721094723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74244.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 721094723 is about 26853.2069406989. The cubic root of 721094723 is about 896.7349689928.

The spelling of 721094723 in words is "seven hundred twenty-one million, ninety-four thousand, seven hundred twenty-three".