723021345 has 48 divisors (see below), whose sum is σ = 1323541440. Its totient is φ = 364113792.

The previous prime is 723021319. The next prime is 723021437. The reversal of 723021345 is 543120327.

It is not a de Polignac number, because 723021345 - 2¹³ = 723013153 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 295467 + ... + 297903.

It is an arithmetic number, because the mean of its divisors is an integer number (27573780).

Almost surely, 2^723021345 is an apocalyptic number.

It is an amenable number.

723021345 is a deficient number, since it is larger than the sum of its proper divisors (600520095).

723021345 is a wasteful number, since it uses less digits than its factorization.

723021345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 723021345 is about 26889.0562311138. The cubic root of 723021345 is about 897.5328914113.

The spelling of 723021345 in words is "seven hundred twenty-three million, twenty-one thousand, three hundred forty-five".