238691354591 has 2 divisors, whose sum is σ = 238691354592. Its totient is φ = 238691354590.

The previous prime is 238691354537. The next prime is 238691354611. The reversal of 238691354591 is 195453196832.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238691354591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238691354791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119345677295 + 119345677296.

It is an arithmetic number, because the mean of its divisors is an integer number (119345677296).

Almost surely, 2^238691354591 is an apocalyptic number.

238691354591 is a deficient number, since it is larger than the sum of its proper divisors (1).

238691354591 is an equidigital number, since it uses as much as digits as its factorization.

238691354591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 56.

The spelling of 238691354591 in words is "two hundred thirty-eight billion, six hundred ninety-one million, three hundred fifty-four thousand, five hundred ninety-one".