1662397 has 8 divisors (see below), whose sum is σ = 1837440. Its totient is φ = 1491360.

The previous prime is 1662389. The next prime is 1662403. The reversal of 1662397 is 7932661.

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 1662397 - 2³ = 1662389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662307) 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, 88 + ... + 1825.

It is an arithmetic number, because the mean of its divisors is an integer number (229680).

2^1662397 is an apocalyptic number.

It is an amenable number.

1662397 is a deficient number, since it is larger than the sum of its proper divisors (175043).

1662397 is a wasteful number, since it uses less digits than its factorization.

1662397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003.

The product of its digits is 13608, while the sum is 34.

The square root of 1662397 is about 1289.3397535173. The cubic root of 1662397 is about 118.4617785781.

The spelling of 1662397 in words is "one million, six hundred sixty-two thousand, three hundred ninety-seven".