1779336961 has 2 divisors, whose sum is σ = 1779336962. Its totient is φ = 1779336960.

The previous prime is 1779336941. The next prime is 1779336997. The reversal of 1779336961 is 1696339771.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1770810561 + 8526400 = 42081^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1779336961 - 2¹³ = 1779328769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1779336899 and 1779336908.

It is not a weakly prime, because it can be changed into another prime (1779336941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 889668480 + 889668481.

It is an arithmetic number, because the mean of its divisors is an integer number (889668481).

Almost surely, 2^1779336961 is an apocalyptic number.

It is an amenable number.

1779336961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1779336961 is an equidigital number, since it uses as much as digits as its factorization.

1779336961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 52.

The square root of 1779336961 is about 42182.1877218335. The cubic root of 1779336961 is about 1211.7677780623.

The spelling of 1779336961 in words is "one billion, seven hundred seventy-nine million, three hundred thirty-six thousand, nine hundred sixty-one".