1948721711 has 2 divisors, whose sum is σ = 1948721712. Its totient is φ = 1948721710.

The previous prime is 1948721707. The next prime is 1948721767. The reversal of 1948721711 is 1171278491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1948721711 - 2² = 1948721707 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1948721701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974360855 + 974360856.

It is an arithmetic number, because the mean of its divisors is an integer number (974360856).

Almost surely, 2^1948721711 is an apocalyptic number.

1948721711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948721711 is an equidigital number, since it uses as much as digits as its factorization.

1948721711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 41.

The square root of 1948721711 is about 44144.3281860762. The cubic root of 1948721711 is about 1249.0599248642.

The spelling of 1948721711 in words is "one billion, nine hundred forty-eight million, seven hundred twenty-one thousand, seven hundred eleven".