1986897 has 8 divisors (see below), whose sum is σ = 2890080. Its totient is φ = 1204160.

The previous prime is 1986893. The next prime is 1986899. The reversal of 1986897 is 7986891.

It is a happy number.

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 1986897 - 2² = 1986893 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1986893) 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, 30072 + ... + 30137.

It is an arithmetic number, because the mean of its divisors is an integer number (361260).

2^1986897 is an apocalyptic number.

It is an amenable number.

1986897 is a deficient number, since it is larger than the sum of its proper divisors (903183).

1986897 is a wasteful number, since it uses less digits than its factorization.

1986897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60223.

The product of its digits is 217728, while the sum is 48.

The square root of 1986897 is about 1409.5733397025. The cubic root of 1986897 is about 125.7163561618.

The spelling of 1986897 in words is "one million, nine hundred eighty-six thousand, eight hundred ninety-seven".