238963631 has 2 divisors, whose sum is σ = 238963632. Its totient is φ = 238963630.

The previous prime is 238963603. The next prime is 238963633. The reversal of 238963631 is 136369832.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238963631 is a prime.

It is a super-2 number, since 2×238963631² = 114207233881408322, which contains 22 as substring.

Together with 238963633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238963633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119481815 + 119481816.

It is an arithmetic number, because the mean of its divisors is an integer number (119481816).

Almost surely, 2^238963631 is an apocalyptic number.

238963631 is a deficient number, since it is larger than the sum of its proper divisors (1).

238963631 is an equidigital number, since it uses as much as digits as its factorization.

238963631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 238963631 is about 15458.4485314665. The cubic root of 238963631 is about 620.5506995757.

The spelling of 238963631 in words is "two hundred thirty-eight million, nine hundred sixty-three thousand, six hundred thirty-one".