713921 has 4 divisors (see below), whose sum is σ = 768852. Its totient is φ = 658992.

The previous prime is 713917. The next prime is 713927. The reversal of 713921 is 129317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129317 = 89 ⋅1453.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 541696 = 415^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 713921 - 2² = 713917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 713921.

It is not an unprimeable number, because it can be changed into a prime (713927) 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, 27446 + ... + 27471.

It is an arithmetic number, because the mean of its divisors is an integer number (192213).

2⁷¹³⁹²¹ is an apocalyptic number.

It is an amenable number.

713921 is a deficient number, since it is larger than the sum of its proper divisors (54931).

713921 is a wasteful number, since it uses less digits than its factorization.

713921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54930.

The product of its digits is 378, while the sum is 23.

The square root of 713921 is about 844.9384592975. The cubic root of 713921 is about 89.3751366813.

The spelling of 713921 in words is "seven hundred thirteen thousand, nine hundred twenty-one".