1655717149 has 2 divisors, whose sum is σ = 1655717150. Its totient is φ = 1655717148.

The previous prime is 1655717143. The next prime is 1655717183. The reversal of 1655717149 is 9417175561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1644708025 + 11009124 = 40555^2 + 3318^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655717149 - 2⁹ = 1655716637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1655717099 and 1655717108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655717143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827858574 + 827858575.

It is an arithmetic number, because the mean of its divisors is an integer number (827858575).

Almost surely, 2^1655717149 is an apocalyptic number.

It is an amenable number.

1655717149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655717149 is an equidigital number, since it uses as much as digits as its factorization.

1655717149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 46.

The square root of 1655717149 is about 40690.5044082769. The cubic root of 1655717149 is about 1183.0289770099.

The spelling of 1655717149 in words is "one billion, six hundred fifty-five million, seven hundred seventeen thousand, one hundred forty-nine".