723891397 has 8 divisors (see below), whose sum is σ = 757169280. Its totient is φ = 690763920.

The previous prime is 723891353. The next prime is 723891401. The reversal of 723891397 is 793198327.

723891397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 723891397 - 2⁷ = 723891269 is a prime.

It is a super-2 number, since 2×723891397² = 1048037509301223218, which contains 22 as substring.

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 723891397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723891097) 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, 27697 + ... + 47062.

It is an arithmetic number, because the mean of its divisors is an integer number (94646160).

Almost surely, 2^723891397 is an apocalyptic number.

It is an amenable number.

723891397 is a deficient number, since it is larger than the sum of its proper divisors (33277883).

723891397 is a wasteful number, since it uses less digits than its factorization.

723891397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75203.

The product of its digits is 571536, while the sum is 49.

The square root of 723891397 is about 26905.2299191068. The cubic root of 723891397 is about 897.8927642644.

The spelling of 723891397 in words is "seven hundred twenty-three million, eight hundred ninety-one thousand, three hundred ninety-seven".