4723921 has 2 divisors, whose sum is σ = 4723922. Its totient is φ = 4723920.

The previous prime is 4723879. The next prime is 4723933. The reversal of 4723921 is 1293274.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4363921 + 360000 = 2089^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 4723921 - 2⁹ = 4723409 is a prime.

It is a super-2 number, since 2×4723921² = 44630859228482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4723921.

It is not a weakly prime, because it can be changed into another prime (4723981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2361960 + 2361961.

It is an arithmetic number, because the mean of its divisors is an integer number (2361961).

Almost surely, 2^4723921 is an apocalyptic number.

It is an amenable number.

4723921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4723921 is an equidigital number, since it uses as much as digits as its factorization.

4723921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 4723921 is about 2173.4583041779. The cubic root of 4723921 is about 167.7905671613.

The spelling of 4723921 in words is "four million, seven hundred twenty-three thousand, nine hundred twenty-one".