1649259103 has 4 divisors (see below), whose sum is σ = 1652646160. Its totient is φ = 1645872048.

The previous prime is 1649259083. The next prime is 1649259107. The reversal of 1649259103 is 3019529461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3019529461 = 13 ⋅232271497.

It is a cyclic number.

It is not a de Polignac number, because 1649259103 - 2⁹ = 1649258591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649259107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692798 + ... + 1693771.

It is an arithmetic number, because the mean of its divisors is an integer number (413161540).

Almost surely, 2^1649259103 is an apocalyptic number.

1649259103 is a deficient number, since it is larger than the sum of its proper divisors (3387057).

1649259103 is an equidigital number, since it uses as much as digits as its factorization.

1649259103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387056.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 1649259103 is about 40611.0711875469. The cubic root of 1649259103 is about 1181.4888567942.

The spelling of 1649259103 in words is "one billion, six hundred forty-nine million, two hundred fifty-nine thousand, one hundred three".