723430645 has 16 divisors (see below), whose sum is σ = 997337088. Its totient is φ = 493464960.

The previous prime is 723430639. The next prime is 723430679. The reversal of 723430645 is 546034327.

It is not a de Polignac number, because 723430645 - 2³ = 723430637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 723430645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47424 + ... + 60793.

It is an arithmetic number, because the mean of its divisors is an integer number (62333568).

Almost surely, 2^723430645 is an apocalyptic number.

It is an amenable number.

723430645 is a deficient number, since it is larger than the sum of its proper divisors (273906443).

723430645 is a wasteful number, since it uses less digits than its factorization.

723430645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108420.

The product of its (nonzero) digits is 60480, while the sum is 34.

The square root of 723430645 is about 26896.6660573388. Note that the first 3 decimals coincide. The cubic root of 723430645 is about 897.7022229330.

The spelling of 723430645 in words is "seven hundred twenty-three million, four hundred thirty thousand, six hundred forty-five".