1706656549 has 4 divisors (see below), whose sum is σ = 1837937836. Its totient is φ = 1575375264.

The previous prime is 1706656531. The next prime is 1706656573. The reversal of 1706656549 is 9456566071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9456566071 = 16981 ⋅556891.

It can be written as a sum of positive squares in 2 ways, for example, as 189943524 + 1516713025 = 13782^2 + 38945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1706656549 - 2⁵ = 1706656517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1706656249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65640624 + ... + 65640649.

It is an arithmetic number, because the mean of its divisors is an integer number (459484459).

Almost surely, 2^1706656549 is an apocalyptic number.

It is an amenable number.

1706656549 is a deficient number, since it is larger than the sum of its proper divisors (131281287).

1706656549 is a wasteful number, since it uses less digits than its factorization.

1706656549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131281286.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 1706656549 is about 41311.6999045065. The cubic root of 1706656549 is about 1195.0389042148.

The spelling of 1706656549 in words is "one billion, seven hundred six million, six hundred fifty-six thousand, five hundred forty-nine".