1380105557 has 2 divisors, whose sum is σ = 1380105558. Its totient is φ = 1380105556.

The previous prime is 1380105533. The next prime is 1380105599. The reversal of 1380105557 is 7555010831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1360798321 + 19307236 = 36889^2 + 4394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380105557 - 2¹⁶ = 1380040021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380101557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690052778 + 690052779.

It is an arithmetic number, because the mean of its divisors is an integer number (690052779).

Almost surely, 2^1380105557 is an apocalyptic number.

It is an amenable number.

1380105557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380105557 is an equidigital number, since it uses as much as digits as its factorization.

1380105557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 35.

The square root of 1380105557 is about 37149.7719643069. The cubic root of 1380105557 is about 1113.3646673764.

The spelling of 1380105557 in words is "one billion, three hundred eighty million, one hundred five thousand, five hundred fifty-seven".