723614721 has 4 divisors (see below), whose sum is σ = 964819632. Its totient is φ = 482409812.

The previous prime is 723614719. The next prime is 723614761. The reversal of 723614721 is 127416327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 723614721 - 2¹ = 723614719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (723614711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120602451 + ... + 120602456.

It is an arithmetic number, because the mean of its divisors is an integer number (241204908).

Almost surely, 2^723614721 is an apocalyptic number.

It is an amenable number.

723614721 is a deficient number, since it is larger than the sum of its proper divisors (241204911).

723614721 is a wasteful number, since it uses less digits than its factorization.

723614721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241204910.

The product of its digits is 14112, while the sum is 33.

The square root of 723614721 is about 26900.0877507862. The cubic root of 723614721 is about 897.7783562026.

The spelling of 723614721 in words is "seven hundred twenty-three million, six hundred fourteen thousand, seven hundred twenty-one".