238452491 has 2 divisors, whose sum is σ = 238452492. Its totient is φ = 238452490.

The previous prime is 238452469. The next prime is 238452493. The reversal of 238452491 is 194254832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238452491 - 2¹⁸ = 238190347 is a prime.

It is a Sophie Germain prime.

Together with 238452493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (238452493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119226245 + 119226246.

It is an arithmetic number, because the mean of its divisors is an integer number (119226246).

Almost surely, 2^238452491 is an apocalyptic number.

238452491 is a deficient number, since it is larger than the sum of its proper divisors (1).

238452491 is an equidigital number, since it uses as much as digits as its factorization.

238452491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 238452491 is about 15441.9069742050. The cubic root of 238452491 is about 620.1079338625.

The spelling of 238452491 in words is "two hundred thirty-eight million, four hundred fifty-two thousand, four hundred ninety-one".