4721819 has 2 divisors, whose sum is σ = 4721820. Its totient is φ = 4721818.

The previous prime is 4721813. The next prime is 4721839. The reversal of 4721819 is 9181274.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4721819 is a prime.

It is a super-2 number, since 2×4721819² = 44591149337522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4721813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2360909 + 2360910.

It is an arithmetic number, because the mean of its divisors is an integer number (2360910).

Almost surely, 2^4721819 is an apocalyptic number.

4721819 is a deficient number, since it is larger than the sum of its proper divisors (1).

4721819 is an equidigital number, since it uses as much as digits as its factorization.

4721819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 4721819 is about 2172.9746892221. The cubic root of 4721819 is about 167.7656762498.

The spelling of 4721819 in words is "four million, seven hundred twenty-one thousand, eight hundred nineteen".