2145431489 has 2 divisors, whose sum is σ = 2145431490. Its totient is φ = 2145431488.

The previous prime is 2145431473. The next prime is 2145431507. The reversal of 2145431489 is 9841345412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2133700864 + 11730625 = 46192^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145431489 - 2⁴ = 2145431473 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145431429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072715744 + 1072715745.

It is an arithmetic number, because the mean of its divisors is an integer number (1072715745).

Almost surely, 2^2145431489 is an apocalyptic number.

It is an amenable number.

2145431489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145431489 is an equidigital number, since it uses as much as digits as its factorization.

2145431489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 2145431489 is about 46318.8027587070. The cubic root of 2145431489 is about 1289.7480606882.

The spelling of 2145431489 in words is "two billion, one hundred forty-five million, four hundred thirty-one thousand, four hundred eighty-nine".