1992897 has 16 divisors (see below), whose sum is σ = 3048960. Its totient is φ = 1285200.

The previous prime is 1992889. The next prime is 1992911. The reversal of 1992897 is 7982991.

It is not a de Polignac number, because 1992897 - 2³ = 1992889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1992817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354 + ... + 2027.

It is an arithmetic number, because the mean of its divisors is an integer number (190560).

2^1992897 is an apocalyptic number.

It is an amenable number.

1992897 is a deficient number, since it is larger than the sum of its proper divisors (1056063).

1992897 is a wasteful number, since it uses less digits than its factorization.

1992897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421 (or 2415 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 1992897 is about 1411.7000389601. The cubic root of 1992897 is about 125.8427744136.

The spelling of 1992897 in words is "one million, nine hundred ninety-two thousand, eight hundred ninety-seven".