1948043917 has 2 divisors, whose sum is σ = 1948043918. Its totient is φ = 1948043916.

The previous prime is 1948043891. The next prime is 1948043939. The reversal of 1948043917 is 7193408491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1669621321 + 278422596 = 40861^2 + 16686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1948043917 - 2⁷ = 1948043789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1948043987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974021958 + 974021959.

It is an arithmetic number, because the mean of its divisors is an integer number (974021959).

Almost surely, 2^1948043917 is an apocalyptic number.

It is an amenable number.

1948043917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948043917 is an equidigital number, since it uses as much as digits as its factorization.

1948043917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1948043917 is about 44136.6504959314. The cubic root of 1948043917 is about 1248.9150942828.

The spelling of 1948043917 in words is "one billion, nine hundred forty-eight million, forty-three thousand, nine hundred seventeen".