1689133057 has 4 divisors (see below), whose sum is σ = 1712271940. Its totient is φ = 1665994176.

The previous prime is 1689133031. The next prime is 1689133081. The reversal of 1689133057 is 7503319861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7503319861 = 97 ⋅77353813.

It can be written as a sum of positive squares in 2 ways, for example, as 1126542096 + 562590961 = 33564^2 + 23719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1689133057 - 2¹¹ = 1689131009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1689133157) 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, 11569332 + ... + 11569477.

It is an arithmetic number, because the mean of its divisors is an integer number (428067985).

Almost surely, 2^1689133057 is an apocalyptic number.

It is an amenable number.

1689133057 is a deficient number, since it is larger than the sum of its proper divisors (23138883).

1689133057 is an equidigital number, since it uses as much as digits as its factorization.

1689133057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23138882.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1689133057 is about 41099.0639431119. The cubic root of 1689133057 is about 1190.9347120312.

The spelling of 1689133057 in words is "one billion, six hundred eighty-nine million, one hundred thirty-three thousand, fifty-seven".