238442621 has 2 divisors, whose sum is σ = 238442622. Its totient is φ = 238442620.

The previous prime is 238442599. The next prime is 238442653. The reversal of 238442621 is 126244832.

It is an a-pointer prime, because the next prime (238442653) can be obtained adding 238442621 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125126596 + 113316025 = 11186^2 + 10645^2 .

It is a cyclic number.

It is not a de Polignac number, because 238442621 - 2¹⁸ = 238180477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238442021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119221310 + 119221311.

It is an arithmetic number, because the mean of its divisors is an integer number (119221311).

Almost surely, 2^238442621 is an apocalyptic number.

It is an amenable number.

238442621 is a deficient number, since it is larger than the sum of its proper divisors (1).

238442621 is an equidigital number, since it uses as much as digits as its factorization.

238442621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 32.

The square root of 238442621 is about 15441.5873860170. The cubic root of 238442621 is about 620.0993779307.

The spelling of 238442621 in words is "two hundred thirty-eight million, four hundred forty-two thousand, six hundred twenty-one".