1948722321 has 16 divisors (see below), whose sum is σ = 3197903744. Its totient is φ = 1027897344.

The previous prime is 1948722283. The next prime is 1948722329. The reversal of 1948722321 is 1232278491.

It is not a de Polignac number, because 1948722321 - 2²⁹ = 1411851409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1948722321.

It is not an unprimeable number, because it can be changed into a prime (1948722329) 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 15 ways as a sum of consecutive naturals, for example, 3568816 + ... + 3569361.

It is an arithmetic number, because the mean of its divisors is an integer number (199868984).

Almost surely, 2^1948722321 is an apocalyptic number.

It is an amenable number.

1948722321 is a deficient number, since it is larger than the sum of its proper divisors (1249181423).

1948722321 is a wasteful number, since it uses less digits than its factorization.

1948722321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138200.

The product of its digits is 48384, while the sum is 39.

The square root of 1948722321 is about 44144.3350952305. The cubic root of 1948722321 is about 1249.0600551935.

The spelling of 1948722321 in words is "one billion, nine hundred forty-eight million, seven hundred twenty-two thousand, three hundred twenty-one".