234178649 has 2 divisors, whose sum is σ = 234178650. Its totient is φ = 234178648.

The previous prime is 234178643. The next prime is 234178691. The reversal of 234178649 is 946871432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193627225 + 40551424 = 13915^2 + 6368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234178649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (234178643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117089324 + 117089325.

It is an arithmetic number, because the mean of its divisors is an integer number (117089325).

Almost surely, 2^234178649 is an apocalyptic number.

It is an amenable number.

234178649 is a deficient number, since it is larger than the sum of its proper divisors (1).

234178649 is an equidigital number, since it uses as much as digits as its factorization.

234178649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 234178649 is about 15302.8967519225. The cubic root of 234178649 is about 616.3807951169.

The spelling of 234178649 in words is "two hundred thirty-four million, one hundred seventy-eight thousand, six hundred forty-nine".