238279253 has 2 divisors, whose sum is σ = 238279254. Its totient is φ = 238279252.

The previous prime is 238279231. The next prime is 238279267. The reversal of 238279253 is 352972832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218980804 + 19298449 = 14798^2 + 4393^2 .

It is a cyclic number.

It is not a de Polignac number, because 238279253 - 2¹² = 238275157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 238279253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238279213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119139626 + 119139627.

It is an arithmetic number, because the mean of its divisors is an integer number (119139627).

Almost surely, 2^238279253 is an apocalyptic number.

It is an amenable number.

238279253 is a deficient number, since it is larger than the sum of its proper divisors (1).

238279253 is an equidigital number, since it uses as much as digits as its factorization.

238279253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 238279253 is about 15436.2966089668. The cubic root of 238279253 is about 619.9577260459.

The spelling of 238279253 in words is "two hundred thirty-eight million, two hundred seventy-nine thousand, two hundred fifty-three".