238463909 has 2 divisors, whose sum is σ = 238463910. Its totient is φ = 238463908.

The previous prime is 238463887. The next prime is 238463959. The reversal of 238463909 is 909364832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139759684 + 98704225 = 11822^2 + 9935^2 .

It is a cyclic number.

It is not a de Polignac number, because 238463909 - 2²⁰ = 237415333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 238463909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238463959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119231954 + 119231955.

It is an arithmetic number, because the mean of its divisors is an integer number (119231955).

Almost surely, 2^238463909 is an apocalyptic number.

It is an amenable number.

238463909 is a deficient number, since it is larger than the sum of its proper divisors (1).

238463909 is an equidigital number, since it uses as much as digits as its factorization.

238463909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 238463909 is about 15442.2766780031. The cubic root of 238463909 is about 620.1178314028.

The spelling of 238463909 in words is "two hundred thirty-eight million, four hundred sixty-three thousand, nine hundred nine".