238666973 has 2 divisors, whose sum is σ = 238666974. Its totient is φ = 238666972.

The previous prime is 238666969. The next prime is 238666991. The reversal of 238666973 is 379666832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169078009 + 69588964 = 13003^2 + 8342^2 .

It is a cyclic number.

It is not a de Polignac number, because 238666973 - 2² = 238666969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238666903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119333486 + 119333487.

It is an arithmetic number, because the mean of its divisors is an integer number (119333487).

Almost surely, 2^238666973 is an apocalyptic number.

It is an amenable number.

238666973 is a deficient number, since it is larger than the sum of its proper divisors (1).

238666973 is an equidigital number, since it uses as much as digits as its factorization.

238666973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 50.

The square root of 238666973 is about 15448.8502161164. The cubic root of 238666973 is about 620.2938019599.

The spelling of 238666973 in words is "two hundred thirty-eight million, six hundred sixty-six thousand, nine hundred seventy-three".