238620643 has 2 divisors, whose sum is σ = 238620644. Its totient is φ = 238620642.

The previous prime is 238620637. The next prime is 238620661. The reversal of 238620643 is 346026832.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238620643 is a prime.

It is a super-2 number, since 2×238620643² = 113879622531466898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 238620599 and 238620608.

It is not a weakly prime, because it can be changed into another prime (238620443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119310321 + 119310322.

It is an arithmetic number, because the mean of its divisors is an integer number (119310322).

Almost surely, 2^238620643 is an apocalyptic number.

238620643 is a deficient number, since it is larger than the sum of its proper divisors (1).

238620643 is an equidigital number, since it uses as much as digits as its factorization.

238620643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 238620643 is about 15447.3506789999. The cubic root of 238620643 is about 620.2536622467.

The spelling of 238620643 in words is "two hundred thirty-eight million, six hundred twenty thousand, six hundred forty-three".