1689577057 has 4 divisors (see below), whose sum is σ = 1930945216. Its totient is φ = 1448208900.

The previous prime is 1689577049. The next prime is 1689577081. The reversal of 1689577057 is 7507759861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1689577057 - 2³ = 1689577049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1689576989 and 1689577007.

It is not an unprimeable number, because it can be changed into a prime (1689574057) 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, 120684069 + ... + 120684082.

It is an arithmetic number, because the mean of its divisors is an integer number (482736304).

Almost surely, 2^1689577057 is an apocalyptic number.

It is an amenable number.

1689577057 is a deficient number, since it is larger than the sum of its proper divisors (241368159).

1689577057 is an equidigital number, since it uses as much as digits as its factorization.

1689577057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241368158.

The product of its (nonzero) digits is 3704400, while the sum is 55.

The square root of 1689577057 is about 41104.4651710736. The cubic root of 1689577057 is about 1191.0390512929.

The spelling of 1689577057 in words is "one billion, six hundred eighty-nine million, five hundred seventy-seven thousand, fifty-seven".