1665479 has 2 divisors, whose sum is σ = 1665480. Its totient is φ = 1665478.

The previous prime is 1665467. The next prime is 1665493. The reversal of 1665479 is 9745661.

It is a weak prime.

It is an emirp because it is prime and its reverse (9745661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1665479 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832739 + 832740.

It is an arithmetic number, because the mean of its divisors is an integer number (832740).

2^1665479 is an apocalyptic number.

1665479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665479 is an equidigital number, since it uses as much as digits as its factorization.

1665479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 1665479 is about 1290.5343854388. The cubic root of 1665479 is about 118.5349407667.

The spelling of 1665479 in words is "one million, six hundred sixty-five thousand, four hundred seventy-nine".