1948648979 has 2 divisors, whose sum is σ = 1948648980. Its totient is φ = 1948648978.

The previous prime is 1948648963. The next prime is 1948649009. The reversal of 1948648979 is 9798468491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1948648979 - 2⁴ = 1948648963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1948648909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974324489 + 974324490.

It is an arithmetic number, because the mean of its divisors is an integer number (974324490).

Almost surely, 2^1948648979 is an apocalyptic number.

1948648979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948648979 is an equidigital number, since it uses as much as digits as its factorization.

1948648979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 65.

The square root of 1948648979 is about 44143.5043805994. The cubic root of 1948648979 is about 1249.0443851464.

The spelling of 1948648979 in words is "one billion, nine hundred forty-eight million, six hundred forty-eight thousand, nine hundred seventy-nine".