1720606487 has 2 divisors, whose sum is σ = 1720606488. Its totient is φ = 1720606486.

The previous prime is 1720606417. The next prime is 1720606493. The reversal of 1720606487 is 7846060271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1720606487 - 2⁸ = 1720606231 is a prime.

It is a super-3 number, since 3×1720606487³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1720606417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860303243 + 860303244.

It is an arithmetic number, because the mean of its divisors is an integer number (860303244).

Almost surely, 2^1720606487 is an apocalyptic number.

1720606487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720606487 is an equidigital number, since it uses as much as digits as its factorization.

1720606487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 1720606487 is about 41480.1939122758. The cubic root of 1720606487 is about 1198.2860919221.

The spelling of 1720606487 in words is "one billion, seven hundred twenty million, six hundred six thousand, four hundred eighty-seven".