238102861 has 2 divisors, whose sum is σ = 238102862. Its totient is φ = 238102860.

The previous prime is 238102853. The next prime is 238102873. The reversal of 238102861 is 168201832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218477961 + 19624900 = 14781^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 238102861 - 2³ = 238102853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238102261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119051430 + 119051431.

It is an arithmetic number, because the mean of its divisors is an integer number (119051431).

Almost surely, 2^238102861 is an apocalyptic number.

It is an amenable number.

238102861 is a deficient number, since it is larger than the sum of its proper divisors (1).

238102861 is an equidigital number, since it uses as much as digits as its factorization.

238102861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 238102861 is about 15430.5820045778. The cubic root of 238102861 is about 619.8047086971.

The spelling of 238102861 in words is "two hundred thirty-eight million, one hundred two thousand, eight hundred sixty-one".