1720470727 has 2 divisors, whose sum is σ = 1720470728. Its totient is φ = 1720470726.

The previous prime is 1720470701. The next prime is 1720470781. The reversal of 1720470727 is 7270740271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1720470727 - 2¹⁵ = 1720437959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720479727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860235363 + 860235364.

It is an arithmetic number, because the mean of its divisors is an integer number (860235364).

Almost surely, 2^1720470727 is an apocalyptic number.

1720470727 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720470727 is an equidigital number, since it uses as much as digits as its factorization.

1720470727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38416, while the sum is 37.

The square root of 1720470727 is about 41478.5574363429. The cubic root of 1720470727 is about 1198.2545752059.

The spelling of 1720470727 in words is "one billion, seven hundred twenty million, four hundred seventy thousand, seven hundred twenty-seven".