2123270489 has 4 divisors (see below), whose sum is σ = 2123747556. Its totient is φ = 2122793424.

The previous prime is 2123270483. The next prime is 2123270519. The reversal of 2123270489 is 9840723212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2079816025 + 43454464 = 45605^2 + 6592^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123270489 - 2²⁸ = 1854835033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123270483) 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 in 3 ways as a sum of consecutive naturals, for example, 231794 + ... + 240779.

It is an arithmetic number, because the mean of its divisors is an integer number (530936889).

Almost surely, 2^2123270489 is an apocalyptic number.

It is an amenable number.

2123270489 is a deficient number, since it is larger than the sum of its proper divisors (477067).

2123270489 is an equidigital number, since it uses as much as digits as its factorization.

2123270489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477066.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2123270489 is about 46078.9592872929. The cubic root of 2123270489 is about 1285.2919116578.

The spelling of 2123270489 in words is "two billion, one hundred twenty-three million, two hundred seventy thousand, four hundred eighty-nine".