238987769 has 2 divisors, whose sum is σ = 238987770. Its totient is φ = 238987768.

The previous prime is 238987741. The next prime is 238987783. The reversal of 238987769 is 967789832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157753600 + 81234169 = 12560^2 + 9013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238987769 is a prime.

It is a super-2 number, since 2×238987769² = 114230307463194722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238987709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119493884 + 119493885.

It is an arithmetic number, because the mean of its divisors is an integer number (119493885).

Almost surely, 2^238987769 is an apocalyptic number.

It is an amenable number.

238987769 is a deficient number, since it is larger than the sum of its proper divisors (1).

238987769 is an equidigital number, since it uses as much as digits as its factorization.

238987769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 59.

The square root of 238987769 is about 15459.2292498688. The cubic root of 238987769 is about 620.5715930598.

The spelling of 238987769 in words is "two hundred thirty-eight million, nine hundred eighty-seven thousand, seven hundred sixty-nine".