1908064513 has 4 divisors (see below), whose sum is σ = 2020303620. Its totient is φ = 1795825408.

The previous prime is 1908064469. The next prime is 1908064517. The reversal of 1908064513 is 3154608091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3154608091 = 797 ⋅3958103.

It can be written as a sum of positive squares in 2 ways, for example, as 1722914064 + 185150449 = 41508^2 + 13607^2 .

It is a cyclic number.

It is not a de Polignac number, because 1908064513 - 2⁹ = 1908064001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1908064517) 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, 56119528 + ... + 56119561.

It is an arithmetic number, because the mean of its divisors is an integer number (505075905).

Almost surely, 2^1908064513 is an apocalyptic number.

It is an amenable number.

1908064513 is a deficient number, since it is larger than the sum of its proper divisors (112239107).

1908064513 is a wasteful number, since it uses less digits than its factorization.

1908064513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112239106.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1908064513 is about 43681.3977912795. The cubic root of 1908064513 is about 1240.3122074159.

The spelling of 1908064513 in words is "one billion, nine hundred eight million, sixty-four thousand, five hundred thirteen".