1680957 has 6 divisors (see below), whose sum is σ = 2428062. Its totient is φ = 1120632.

The previous prime is 1680929. The next prime is 1680961. The reversal of 1680957 is 7590861.

It can be written as a sum of positive squares in only one way, i.e., 881721 + 799236 = 939^2 + 894^2 .

It is not a de Polignac number, because 1680957 - 2⁶ = 1680893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93378 + ... + 93395.

It is an arithmetic number, because the mean of its divisors is an integer number (404677).

2^1680957 is an apocalyptic number.

It is an amenable number.

1680957 is a deficient number, since it is larger than the sum of its proper divisors (747105).

1680957 is a wasteful number, since it uses less digits than its factorization.

1680957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186779 (or 186776 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1680957 is about 1296.5172578875. The cubic root of 1680957 is about 118.9010075217.

The spelling of 1680957 in words is "one million, six hundred eighty thousand, nine hundred fifty-seven".