234111989 has 2 divisors, whose sum is σ = 234111990. Its totient is φ = 234111988.

The previous prime is 234111973. The next prime is 234112007. The reversal of 234111989 is 989111432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170511364 + 63600625 = 13058^2 + 7975^2 .

It is a cyclic number.

It is not a de Polignac number, because 234111989 - 2⁴ = 234111973 is a prime.

It is a super-2 number, since 2×234111989² = 109616846787072242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234111959) 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, 117055994 + 117055995.

It is an arithmetic number, because the mean of its divisors is an integer number (117055995).

Almost surely, 2^234111989 is an apocalyptic number.

It is an amenable number.

234111989 is a deficient number, since it is larger than the sum of its proper divisors (1).

234111989 is an equidigital number, since it uses as much as digits as its factorization.

234111989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 234111989 is about 15300.7185778969. The cubic root of 234111989 is about 616.3223043832.

The spelling of 234111989 in words is "two hundred thirty-four million, one hundred eleven thousand, nine hundred eighty-nine".