238105949 has 2 divisors, whose sum is σ = 238105950. Its totient is φ = 238105948.

The previous prime is 238105937. The next prime is 238105951. The reversal of 238105949 is 949501832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141181924 + 96924025 = 11882^2 + 9845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238105949 is a prime.

Together with 238105951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238105909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119052974 + 119052975.

It is an arithmetic number, because the mean of its divisors is an integer number (119052975).

Almost surely, 2^238105949 is an apocalyptic number.

It is an amenable number.

238105949 is a deficient number, since it is larger than the sum of its proper divisors (1).

238105949 is an equidigital number, since it uses as much as digits as its factorization.

238105949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 238105949 is about 15430.6820652880. The cubic root of 238105949 is about 619.8073881394.

The spelling of 238105949 in words is "two hundred thirty-eight million, one hundred five thousand, nine hundred forty-nine".