1679997 has 8 divisors (see below), whose sum is σ = 2443680. Its totient is φ = 1018160.

The previous prime is 1679981. The next prime is 1680013. The reversal of 1679997 is 7999761.

It is an interprime number because it is at equal distance from previous prime (1679981) and next prime (1680013).

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

It is not a de Polignac number, because 1679997 - 2⁴ = 1679981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25422 + ... + 25487.

It is an arithmetic number, because the mean of its divisors is an integer number (305460).

2^1679997 is an apocalyptic number.

It is an amenable number.

1679997 is a deficient number, since it is larger than the sum of its proper divisors (763683).

1679997 is a wasteful number, since it uses less digits than its factorization.

1679997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50923.

The product of its digits is 214326, while the sum is 48.

The square root of 1679997 is about 1296.1469824059. The cubic root of 1679997 is about 118.8783682942.

The spelling of 1679997 in words is "one million, six hundred seventy-nine thousand, nine hundred ninety-seven".