238216687 has 2 divisors, whose sum is σ = 238216688. Its totient is φ = 238216686.

The previous prime is 238216663. The next prime is 238216703. The reversal of 238216687 is 786612832.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238216687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238216607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119108343 + 119108344.

It is an arithmetic number, because the mean of its divisors is an integer number (119108344).

Almost surely, 2^238216687 is an apocalyptic number.

238216687 is a deficient number, since it is larger than the sum of its proper divisors (1).

238216687 is an equidigital number, since it uses as much as digits as its factorization.

238216687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 238216687 is about 15434.2698887897. The cubic root of 238216687 is about 619.9034596476.

The spelling of 238216687 in words is "two hundred thirty-eight million, two hundred sixteen thousand, six hundred eighty-seven".