234451891 has 2 divisors, whose sum is σ = 234451892. Its totient is φ = 234451890.

The previous prime is 234451831. The next prime is 234451897. The reversal of 234451891 is 198154432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 234451891 - 2⁹ = 234451379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 234451891.

It is not a weakly prime, because it can be changed into another prime (234451897) 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, 117225945 + 117225946.

It is an arithmetic number, because the mean of its divisors is an integer number (117225946).

Almost surely, 2^234451891 is an apocalyptic number.

234451891 is a deficient number, since it is larger than the sum of its proper divisors (1).

234451891 is an equidigital number, since it uses as much as digits as its factorization.

234451891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 234451891 is about 15311.8219360075. The cubic root of 234451891 is about 616.6204350375.

The spelling of 234451891 in words is "two hundred thirty-four million, four hundred fifty-one thousand, eight hundred ninety-one".