1649520113 has 4 divisors (see below), whose sum is σ = 1680643188. Its totient is φ = 1618397040.

The previous prime is 1649520109. The next prime is 1649520133. The reversal of 1649520113 is 3110259461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3110259461 = 67 ⋅46421783.

It can be written as a sum of positive squares in 2 ways, for example, as 601573729 + 1047946384 = 24527^2 + 32372^2 .

It is a cyclic number.

It is not a de Polignac number, because 1649520113 - 2² = 1649520109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649520113.

It is not an unprimeable number, because it can be changed into a prime (1649520133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15561458 + ... + 15561563.

It is an arithmetic number, because the mean of its divisors is an integer number (420160797).

Almost surely, 2^1649520113 is an apocalyptic number.

It is an amenable number.

1649520113 is a deficient number, since it is larger than the sum of its proper divisors (31123075).

1649520113 is an equidigital number, since it uses as much as digits as its factorization.

1649520113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31123074.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1649520113 is about 40614.2845929853. The cubic root of 1649520113 is about 1181.5511805652.

Adding to 1649520113 its reverse (3110259461), we get a palindrome (4759779574).

The spelling of 1649520113 in words is "one billion, six hundred forty-nine million, five hundred twenty thousand, one hundred thirteen".