238791653 has 2 divisors, whose sum is σ = 238791654. Its totient is φ = 238791652.

The previous prime is 238791649. The next prime is 238791697. The reversal of 238791653 is 356197832.

It is an a-pointer prime, because the next prime (238791697) can be obtained adding 238791653 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213218404 + 25573249 = 14602^2 + 5057^2 .

It is a cyclic number.

It is not a de Polignac number, because 238791653 - 2² = 238791649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238791613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119395826 + 119395827.

It is an arithmetic number, because the mean of its divisors is an integer number (119395827).

Almost surely, 2^238791653 is an apocalyptic number.

It is an amenable number.

238791653 is a deficient number, since it is larger than the sum of its proper divisors (1).

238791653 is an equidigital number, since it uses as much as digits as its factorization.

238791653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 238791653 is about 15452.8849410070. The cubic root of 238791653 is about 620.4017973073.

The spelling of 238791653 in words is "two hundred thirty-eight million, seven hundred ninety-one thousand, six hundred fifty-three".