1689776413 has 12 divisors (see below), whose sum is σ = 1832616660. Its totient is φ = 1558015056.

The previous prime is 1689776393. The next prime is 1689776447. The reversal of 1689776413 is 3146779861.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 540702009 + 1149074404 = 23253^2 + 33898^2 .

It is not a de Polignac number, because 1689776413 - 2¹³ = 1689768221 is a prime.

It is a super-2 number, since 2×1689776413² = 5710688651862293138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689746413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1926331 + ... + 1927207.

It is an arithmetic number, because the mean of its divisors is an integer number (152718055).

Almost surely, 2^1689776413 is an apocalyptic number.

1689776413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1689776413 is a deficient number, since it is larger than the sum of its proper divisors (142840247).

1689776413 is an frugal number, since it uses more digits than its factorization.

1689776413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793 (or 890 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The square root of 1689776413 is about 41106.8900915649. The cubic root of 1689776413 is about 1191.0858936752.

Multiplying 1689776413 by its sum of digits (52), we get a square (87868373476 = 296426²).

The spelling of 1689776413 in words is "one billion, six hundred eighty-nine million, seven hundred seventy-six thousand, four hundred thirteen".