4663921 has 2 divisors, whose sum is σ = 4663922. Its totient is φ = 4663920.

The previous prime is 4663913. The next prime is 4663927. The reversal of 4663921 is 1293664.

4663921 is nontrivially palindromic in base 2.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4223025 + 440896 = 2055^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 4663921 - 2³ = 4663913 is a prime.

It is not a weakly prime, because it can be changed into another prime (4663927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2331960 + 2331961.

It is an arithmetic number, because the mean of its divisors is an integer number (2331961).

Almost surely, 2^4663921 is an apocalyptic number.

It is an amenable number.

4663921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4663921 is an equidigital number, since it uses as much as digits as its factorization.

4663921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 4663921 is about 2159.6113076200. The cubic root of 4663921 is about 167.0771512953.

The spelling of 4663921 in words is "four million, six hundred sixty-three thousand, nine hundred twenty-one".