1644097 has 24 divisors (see below), whose sum is σ = 2154600. Its totient is φ = 1241856.

The previous prime is 1644079. The next prime is 1644103. The reversal of 1644097 is 7904461.

It can be written as a sum of positive squares in 4 ways, for example, as 3136 + 1640961 = 56^2 + 1281^2 .

It is not a de Polignac number, because 1644097 - 2⁷ = 1643969 is a prime.

It is a super-3 number, since 3×1644097³ = 13332253579746302019, which contains 333 as substring.

1644097 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18429 + ... + 18517.

It is an arithmetic number, because the mean of its divisors is an integer number (89775).

2^1644097 is an apocalyptic number.

It is an amenable number.

1644097 is a deficient number, since it is larger than the sum of its proper divisors (510503).

1644097 is a wasteful number, since it uses less digits than its factorization.

1644097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1644097 is about 1282.2234594641. The cubic root of 1644097 is about 118.0254900406.

The spelling of 1644097 in words is "one million, six hundred forty-four thousand, ninety-seven".