1705809045 has 32 divisors (see below), whose sum is σ = 2746800000. Its totient is φ = 903953664.

The previous prime is 1705809043. The next prime is 1705809101. The reversal of 1705809045 is 5409085071.

It is not a de Polignac number, because 1705809045 - 2¹ = 1705809043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1705808994 and 1705809012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1705809041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2611939 + ... + 2612591.

It is an arithmetic number, because the mean of its divisors is an integer number (85837500).

Almost surely, 2^1705809045 is an apocalyptic number.

1705809045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1705809045 is a deficient number, since it is larger than the sum of its proper divisors (1040990955).

1705809045 is a wasteful number, since it uses less digits than its factorization.

1705809045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 1705809045 is about 41301.4411976144. The cubic root of 1705809045 is about 1194.8410577400.

The spelling of 1705809045 in words is "one billion, seven hundred five million, eight hundred nine thousand, forty-five".