1403345561 has 2 divisors, whose sum is σ = 1403345562. Its totient is φ = 1403345560.

The previous prime is 1403345551. The next prime is 1403345579. The reversal of 1403345561 is 1655433041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254505561 + 148840000 = 35419^2 + 12200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403345561 - 2¹⁸ = 1403083417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1403345521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701672780 + 701672781.

It is an arithmetic number, because the mean of its divisors is an integer number (701672781).

Almost surely, 2^1403345561 is an apocalyptic number.

It is an amenable number.

1403345561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403345561 is an equidigital number, since it uses as much as digits as its factorization.

1403345561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1403345561 is about 37461.2541301009. The cubic root of 1403345561 is about 1119.5793384624.

The spelling of 1403345561 in words is "one billion, four hundred three million, three hundred forty-five thousand, five hundred sixty-one".