1405990193 has 2 divisors, whose sum is σ = 1405990194. Its totient is φ = 1405990192.

The previous prime is 1405990141. The next prime is 1405990211. The reversal of 1405990193 is 3910995041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1287876769 + 118113424 = 35887^2 + 10868^2 .

It is an emirp because it is prime and its reverse (3910995041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1405990193 - 2¹² = 1405986097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1405990193.

It is not a weakly prime, because it can be changed into another prime (1405990133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702995096 + 702995097.

It is an arithmetic number, because the mean of its divisors is an integer number (702995097).

Almost surely, 2^1405990193 is an apocalyptic number.

It is an amenable number.

1405990193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405990193 is an equidigital number, since it uses as much as digits as its factorization.

1405990193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 1405990193 is about 37496.5357466526. The cubic root of 1405990193 is about 1120.2821868151.

The spelling of 1405990193 in words is "one billion, four hundred five million, nine hundred ninety thousand, one hundred ninety-three".