723961 has 4 divisors (see below), whose sum is σ = 827392. Its totient is φ = 620532.

The previous prime is 723959. The next prime is 723967. The reversal of 723961 is 169327.

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 723961 - 2¹ = 723959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (723967) 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, 51705 + ... + 51718.

It is an arithmetic number, because the mean of its divisors is an integer number (206848).

2⁷²³⁹⁶¹ is an apocalyptic number.

It is an amenable number.

723961 is a deficient number, since it is larger than the sum of its proper divisors (103431).

723961 is a wasteful number, since it uses less digits than its factorization.

723961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103430.

The product of its digits is 2268, while the sum is 28.

The square root of 723961 is about 850.8589777396. The cubic root of 723961 is about 89.7921541153.

The spelling of 723961 in words is "seven hundred twenty-three thousand, nine hundred sixty-one".