1781413061 has 2 divisors, whose sum is σ = 1781413062. Its totient is φ = 1781413060.

The previous prime is 1781413037. The next prime is 1781413069. The reversal of 1781413061 is 1603141871.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062368836 + 719044225 = 32594^2 + 26815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1781413061 - 2¹⁰ = 1781412037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1781413069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890706530 + 890706531.

It is an arithmetic number, because the mean of its divisors is an integer number (890706531).

Almost surely, 2^1781413061 is an apocalyptic number.

It is an amenable number.

1781413061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1781413061 is an equidigital number, since it uses as much as digits as its factorization.

1781413061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1781413061 is about 42206.7892761342. The cubic root of 1781413061 is about 1212.2388848711.

The spelling of 1781413061 in words is "one billion, seven hundred eighty-one million, four hundred thirteen thousand, sixty-one".