1811472979 has 2 divisors, whose sum is σ = 1811472980. Its totient is φ = 1811472978.

The previous prime is 1811472917. The next prime is 1811473007. The reversal of 1811472979 is 9792741181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1811472979 - 2¹⁷ = 1811341907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1811472679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905736489 + 905736490.

It is an arithmetic number, because the mean of its divisors is an integer number (905736490).

Almost surely, 2^1811472979 is an apocalyptic number.

1811472979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811472979 is an equidigital number, since it uses as much as digits as its factorization.

1811472979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 49.

The square root of 1811472979 is about 42561.4024557462. The cubic root of 1811472979 is about 1219.0194080066.

The spelling of 1811472979 in words is "one billion, eight hundred eleven million, four hundred seventy-two thousand, nine hundred seventy-nine".