1720012733 has 2 divisors, whose sum is σ = 1720012734. Its totient is φ = 1720012732.

The previous prime is 1720012717. The next prime is 1720012739. The reversal of 1720012733 is 3372100271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1380642649 + 339370084 = 37157^2 + 18422^2 .

It is a cyclic number.

It is not a de Polignac number, because 1720012733 - 2⁴ = 1720012717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720012739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860006366 + 860006367.

It is an arithmetic number, because the mean of its divisors is an integer number (860006367).

Almost surely, 2^1720012733 is an apocalyptic number.

It is an amenable number.

1720012733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720012733 is an equidigital number, since it uses as much as digits as its factorization.

1720012733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 1720012733 is about 41473.0362163177. The cubic root of 1720012733 is about 1198.1482395577.

The spelling of 1720012733 in words is "one billion, seven hundred twenty million, twelve thousand, seven hundred thirty-three".