1706137645 has 4 divisors (see below), whose sum is σ = 2047365180. Its totient is φ = 1364910112.

The previous prime is 1706137639. The next prime is 1706137679. The reversal of 1706137645 is 5467316071.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 949502596 + 756635049 = 30814^2 + 27507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1706137645 - 2⁹ = 1706137133 is a prime.

It is a super-3 number, since 3×1706137645³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1706137598 and 1706137607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170613760 + ... + 170613769.

It is an arithmetic number, because the mean of its divisors is an integer number (511841295).

Almost surely, 2^1706137645 is an apocalyptic number.

It is an amenable number.

1706137645 is a deficient number, since it is larger than the sum of its proper divisors (341227535).

1706137645 is an equidigital number, since it uses as much as digits as its factorization.

1706137645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341227534.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1706137645 is about 41305.4190754676. The cubic root of 1706137645 is about 1194.9177758940.

The spelling of 1706137645 in words is "one billion, seven hundred six million, one hundred thirty-seven thousand, six hundred forty-five".