1202431189 has 2 divisors, whose sum is σ = 1202431190. Its totient is φ = 1202431188.

The previous prime is 1202431183. The next prime is 1202431201. The reversal of 1202431189 is 9811342021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 796086225 + 406344964 = 28215^2 + 20158^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202431189 - 2²⁵ = 1168876757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1202431189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202431183) 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, 601215594 + 601215595.

It is an arithmetic number, because the mean of its divisors is an integer number (601215595).

Almost surely, 2^1202431189 is an apocalyptic number.

It is an amenable number.

1202431189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202431189 is an equidigital number, since it uses as much as digits as its factorization.

1202431189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1202431189 is about 34676.0895863418. The cubic root of 1202431189 is about 1063.3757305863.

The spelling of 1202431189 in words is "one billion, two hundred two million, four hundred thirty-one thousand, one hundred eighty-nine".