2123239969 has 2 divisors, whose sum is σ = 2123239970. Its totient is φ = 2123239968.

The previous prime is 2123239957. The next prime is 2123240023. The reversal of 2123239969 is 9699323212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2121799969 + 1440000 = 46063^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123239969 - 2¹⁵ = 2123207201 is a prime.

It is a super-2 number, since 2×2123239969² = 9016295931918241922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2123239919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061619984 + 1061619985.

It is an arithmetic number, because the mean of its divisors is an integer number (1061619985).

Almost surely, 2^2123239969 is an apocalyptic number.

It is an amenable number.

2123239969 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123239969 is an equidigital number, since it uses as much as digits as its factorization.

2123239969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 46.

The square root of 2123239969 is about 46078.6281154290. The cubic root of 2123239969 is about 1285.2857533441.

The spelling of 2123239969 in words is "two billion, one hundred twenty-three million, two hundred thirty-nine thousand, nine hundred sixty-nine".