1687358057 has 8 divisors (see below), whose sum is σ = 2103719232. Its totient is φ = 1314824400.

The previous prime is 1687358053. The next prime is 1687358059. The reversal of 1687358057 is 7508537861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1687358057 - 2² = 1687358053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1687357996 and 1687358014.

It is not an unprimeable number, because it can be changed into a prime (1687358053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10956794 + ... + 10956947.

It is an arithmetic number, because the mean of its divisors is an integer number (262964904).

Almost surely, 2^1687358057 is an apocalyptic number.

It is an amenable number.

1687358057 is a deficient number, since it is larger than the sum of its proper divisors (416361175).

1687358057 is a wasteful number, since it uses less digits than its factorization.

1687358057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21913759.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The square root of 1687358057 is about 41077.4641013780. The cubic root of 1687358057 is about 1190.5174072302.

The spelling of 1687358057 in words is "one billion, six hundred eighty-seven million, three hundred fifty-eight thousand, fifty-seven".