1720630433 has 2 divisors, whose sum is σ = 1720630434. Its totient is φ = 1720630432.

The previous prime is 1720630403. The next prime is 1720630447. The reversal of 1720630433 is 3340360271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1686909184 + 33721249 = 41072^2 + 5807^2 .

It is a cyclic number.

It is not a de Polignac number, because 1720630433 - 2¹⁰ = 1720629409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1720630396 and 1720630405.

It is not a weakly prime, because it can be changed into another prime (1720630403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860315216 + 860315217.

It is an arithmetic number, because the mean of its divisors is an integer number (860315217).

Almost surely, 2^1720630433 is an apocalyptic number.

It is an amenable number.

1720630433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720630433 is an equidigital number, since it uses as much as digits as its factorization.

1720630433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 1720630433 is about 41480.4825550523. The cubic root of 1720630433 is about 1198.2916508196.

The spelling of 1720630433 in words is "one billion, seven hundred twenty million, six hundred thirty thousand, four hundred thirty-three".