1779120671 has 2 divisors, whose sum is σ = 1779120672. Its totient is φ = 1779120670.

The previous prime is 1779120653. The next prime is 1779120701. The reversal of 1779120671 is 1760219771.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1779120671 - 2³⁰ = 705378847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1779120071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 889560335 + 889560336.

It is an arithmetic number, because the mean of its divisors is an integer number (889560336).

Almost surely, 2^1779120671 is an apocalyptic number.

1779120671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1779120671 is an equidigital number, since it uses as much as digits as its factorization.

1779120671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 41.

The square root of 1779120671 is about 42179.6238840509. The cubic root of 1779120671 is about 1211.7186766500.

The spelling of 1779120671 in words is "one billion, seven hundred seventy-nine million, one hundred twenty thousand, six hundred seventy-one".