723390073 has 4 divisors (see below), whose sum is σ = 826731520. Its totient is φ = 620048628.

The previous prime is 723390067. The next prime is 723390133. The reversal of 723390073 is 370093327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 723390073 - 2⁹ = 723389561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723390023) 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, 51670713 + ... + 51670726.

It is an arithmetic number, because the mean of its divisors is an integer number (206682880).

Almost surely, 2^723390073 is an apocalyptic number.

It is an amenable number.

723390073 is a deficient number, since it is larger than the sum of its proper divisors (103341447).

723390073 is a wasteful number, since it uses less digits than its factorization.

723390073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103341446.

The product of its (nonzero) digits is 23814, while the sum is 34.

The square root of 723390073 is about 26895.9118268929. The cubic root of 723390073 is about 897.6854407412.

The spelling of 723390073 in words is "seven hundred twenty-three million, three hundred ninety thousand, seventy-three".