1388890033 has 2 divisors, whose sum is σ = 1388890034. Its totient is φ = 1388890032.

The previous prime is 1388890003. The next prime is 1388890037. The reversal of 1388890033 is 3300988831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 956541184 + 432348849 = 30928^2 + 20793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388890033 - 2⁹ = 1388889521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1388890037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694445016 + 694445017.

It is an arithmetic number, because the mean of its divisors is an integer number (694445017).

Almost surely, 2^1388890033 is an apocalyptic number.

It is an amenable number.

1388890033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388890033 is an equidigital number, since it uses as much as digits as its factorization.

1388890033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1388890033 is about 37267.8149748546. The cubic root of 1388890033 is about 1115.7218898325.

The spelling of 1388890033 in words is "one billion, three hundred eighty-eight million, eight hundred ninety thousand, thirty-three".