238609957 has 2 divisors, whose sum is σ = 238609958. Its totient is φ = 238609956.

The previous prime is 238609951. The next prime is 238609993. The reversal of 238609957 is 759906832.

238609957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145178401 + 93431556 = 12049^2 + 9666^2 .

It is a cyclic number.

It is not a de Polignac number, because 238609957 - 2³ = 238609949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238609957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238609951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119304978 + 119304979.

It is an arithmetic number, because the mean of its divisors is an integer number (119304979).

Almost surely, 2^238609957 is an apocalyptic number.

It is an amenable number.

238609957 is a deficient number, since it is larger than the sum of its proper divisors (1).

238609957 is an equidigital number, since it uses as much as digits as its factorization.

238609957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 238609957 is about 15447.0047905735. The cubic root of 238609957 is about 620.2444032970.

The spelling of 238609957 in words is "two hundred thirty-eight million, six hundred nine thousand, nine hundred fifty-seven".