1948738609 has 8 divisors (see below), whose sum is σ = 1987108200. Its totient is φ = 1910428416.

The previous prime is 1948738579. The next prime is 1948738613. The reversal of 1948738609 is 9068378491.

It can be written as a sum of positive squares in 4 ways, for example, as 578258209 + 1370480400 = 24047^2 + 37020^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1948738609 - 2²⁵ = 1915184177 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 1948738609.

It is not an unprimeable number, because it can be changed into a prime (1948738639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54567 + ... + 82915.

It is an arithmetic number, because the mean of its divisors is an integer number (248388525).

Almost surely, 2^1948738609 is an apocalyptic number.

It is an amenable number.

1948738609 is a deficient number, since it is larger than the sum of its proper divisors (38369591).

1948738609 is a wasteful number, since it uses less digits than its factorization.

1948738609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29699.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 1948738609 is about 44144.5195805776. The cubic root of 1948738609 is about 1249.0635351888.

The spelling of 1948738609 in words is "one billion, nine hundred forty-eight million, seven hundred thirty-eight thousand, six hundred nine".