238781111 has 2 divisors, whose sum is σ = 238781112. Its totient is φ = 238781110.

The previous prime is 238781077. The next prime is 238781141. The reversal of 238781111 is 111187832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238781111 - 2⁶ = 238781047 is a prime.

It is a super-3 number, since 3×238781111³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238781141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119390555 + 119390556.

It is an arithmetic number, because the mean of its divisors is an integer number (119390556).

Almost surely, 2^238781111 is an apocalyptic number.

238781111 is a deficient number, since it is larger than the sum of its proper divisors (1).

238781111 is an equidigital number, since it uses as much as digits as its factorization.

238781111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 32.

The square root of 238781111 is about 15452.5438358867. The cubic root of 238781111 is about 620.3926674907.

The spelling of 238781111 in words is "two hundred thirty-eight million, seven hundred eighty-one thousand, one hundred eleven".