4630921 has 2 divisors, whose sum is σ = 4630922. Its totient is φ = 4630920.

The previous prime is 4630907. The next prime is 4630931. The reversal of 4630921 is 1290364.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 2134521 = 1580^2 + 1461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4630921 is a prime.

4630921 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4630931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2315460 + 2315461.

It is an arithmetic number, because the mean of its divisors is an integer number (2315461).

Almost surely, 2^4630921 is an apocalyptic number.

It is an amenable number.

4630921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4630921 is an equidigital number, since it uses as much as digits as its factorization.

4630921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 4630921 is about 2151.9574809926. The cubic root of 4630921 is about 166.6821616705.

The spelling of 4630921 in words is "four million, six hundred thirty thousand, nine hundred twenty-one".