1649539 has 2 divisors, whose sum is σ = 1649540. Its totient is φ = 1649538.

The previous prime is 1649533. The next prime is 1649567. The reversal of 1649539 is 9359461.

It is a weak prime.

It is an emirp because it is prime and its reverse (9359461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1649539 - 2⁵ = 1649507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1649498 and 1649507.

It is not a weakly prime, because it can be changed into another prime (1649533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824769 + 824770.

It is an arithmetic number, because the mean of its divisors is an integer number (824770).

2^1649539 is an apocalyptic number.

1649539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649539 is an equidigital number, since it uses as much as digits as its factorization.

1649539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 1649539 is about 1284.3438013242. The cubic root of 1649539 is about 118.1555690134.

The spelling of 1649539 in words is "one million, six hundred forty-nine thousand, five hundred thirty-nine".