1680457001 has 4 divisors (see below), whose sum is σ = 1681591632. Its totient is φ = 1679322372.

The previous prime is 1680456991. The next prime is 1680457043. The reversal of 1680457001 is 1007540861.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1007540861 = 10987 ⋅91703.

It is a cyclic number.

It is not a de Polignac number, because 1680457001 - 2⁶ = 1680456937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680457081) 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, 565091 + ... + 568056.

It is an arithmetic number, because the mean of its divisors is an integer number (420397908).

Almost surely, 2^1680457001 is an apocalyptic number.

It is an amenable number.

1680457001 is a deficient number, since it is larger than the sum of its proper divisors (1134631).

1680457001 is a wasteful number, since it uses less digits than its factorization.

1680457001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134630.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1680457001 is about 40993.3775261322. The cubic root of 1680457001 is about 1188.8921735688.

Adding to 1680457001 its reverse (1007540861), we get a palindrome (2687997862).

The spelling of 1680457001 in words is "one billion, six hundred eighty million, four hundred fifty-seven thousand, one".