4121321989 has 2 divisors, whose sum is σ = 4121321990. Its totient is φ = 4121321988.

The previous prime is 4121321983. The next prime is 4121321993. The reversal of 4121321989 is 9891231214.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4064062500 + 57259489 = 63750^2 + 7567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4121321989 is a prime.

It is a super-2 number, since 2×4121321989² = 33970589874029832242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4121321983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060660994 + 2060660995.

It is an arithmetic number, because the mean of its divisors is an integer number (2060660995).

Almost surely, 2^4121321989 is an apocalyptic number.

It is an amenable number.

4121321989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4121321989 is an equidigital number, since it uses as much as digits as its factorization.

4121321989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 4121321989 is about 64197.5232310406. The cubic root of 4121321989 is about 1603.2903627914.

The spelling of 4121321989 in words is "four billion, one hundred twenty-one million, three hundred twenty-one thousand, nine hundred eighty-nine".