1664953 has 4 divisors (see below), whose sum is σ = 1669248. Its totient is φ = 1660660.

The previous prime is 1664941. The next prime is 1664959. The reversal of 1664953 is 3594661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1664953 - 2¹³ = 1656761 is a prime.

It is a Duffinian number.

1664953 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501 + ... + 2362.

It is an arithmetic number, because the mean of its divisors is an integer number (417312).

2^1664953 is an apocalyptic number.

It is an amenable number.

1664953 is a deficient number, since it is larger than the sum of its proper divisors (4295).

1664953 is an equidigital number, since it uses as much as digits as its factorization.

1664953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294.

The product of its digits is 19440, while the sum is 34.

The square root of 1664953 is about 1290.3305777978. The cubic root of 1664953 is about 118.5224606846.

The spelling of 1664953 in words is "one million, six hundred sixty-four thousand, nine hundred fifty-three".