1202039989 has 2 divisors, whose sum is σ = 1202039990. Its totient is φ = 1202039988.

The previous prime is 1202039983. The next prime is 1202039999. The reversal of 1202039989 is 9899302021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 838565764 + 363474225 = 28958^2 + 19065^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202039989 - 2²¹ = 1199942837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202039983) 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, 601019994 + 601019995.

It is an arithmetic number, because the mean of its divisors is an integer number (601019995).

Almost surely, 2^1202039989 is an apocalyptic number.

It is an amenable number.

1202039989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202039989 is an equidigital number, since it uses as much as digits as its factorization.

1202039989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1202039989 is about 34670.4483530283. The cubic root of 1202039989 is about 1063.2603982189.

The spelling of 1202039989 in words is "one billion, two hundred two million, thirty-nine thousand, nine hundred eighty-nine".