723705993 has 12 divisors (see below), whose sum is σ = 1045590000. Its totient is φ = 482361336.

The previous prime is 723705947. The next prime is 723706007. The reversal of 723705993 is 399507327.

It is not a de Polignac number, because 723705993 - 2⁹ = 723705481 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 (723705893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62130 + ... + 72852.

It is an arithmetic number, because the mean of its divisors is an integer number (87132500).

Almost surely, 2^723705993 is an apocalyptic number.

It is an amenable number.

723705993 is a deficient number, since it is larger than the sum of its proper divisors (321884007).

723705993 is a wasteful number, since it uses less digits than its factorization.

723705993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18228 (or 18225 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 45.

The square root of 723705993 is about 26901.7841973353. The cubic root of 723705993 is about 897.8161012340.

The spelling of 723705993 in words is "seven hundred twenty-three million, seven hundred five thousand, nine hundred ninety-three".