723109642 has 16 divisors (see below), whose sum is σ = 1091502720. Its totient is φ = 359283168.

The previous prime is 723109633. The next prime is 723109649. The reversal of 723109642 is 246901327.

It is a junction number, because it is equal to n+sod(n) for n = 723109598 and 723109607.

It is not an unprimeable number, because it can be changed into a prime (723109649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223734 + ... + 226942.

It is an arithmetic number, because the mean of its divisors is an integer number (68218920).

Almost surely, 2^723109642 is an apocalyptic number.

723109642 is a deficient number, since it is larger than the sum of its proper divisors (368393078).

723109642 is a wasteful number, since it uses less digits than its factorization.

723109642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 723109642 is about 26890.6980571349. The cubic root of 723109642 is about 897.5694261722.

The spelling of 723109642 in words is "seven hundred twenty-three million, one hundred nine thousand, six hundred forty-two".