238734857 has 2 divisors, whose sum is σ = 238734858. Its totient is φ = 238734856.

The previous prime is 238734833. The next prime is 238734883. The reversal of 238734857 is 758437832.

238734857 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., 215972416 + 22762441 = 14696^2 + 4771^2 .

It is a cyclic number.

It is not a de Polignac number, because 238734857 - 2¹² = 238730761 is a prime.

It is not a weakly prime, because it can be changed into another prime (238734817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119367428 + 119367429.

It is an arithmetic number, because the mean of its divisors is an integer number (119367429).

Almost surely, 2^238734857 is an apocalyptic number.

It is an amenable number.

238734857 is a deficient number, since it is larger than the sum of its proper divisors (1).

238734857 is an equidigital number, since it uses as much as digits as its factorization.

238734857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 47.

The square root of 238734857 is about 15451.0471166196. The cubic root of 238734857 is about 620.3526063996.

The spelling of 238734857 in words is "two hundred thirty-eight million, seven hundred thirty-four thousand, eight hundred fifty-seven".