238711385369 has 2 divisors, whose sum is σ = 238711385370. Its totient is φ = 238711385368.

The previous prime is 238711385357. The next prime is 238711385399. The reversal of 238711385369 is 963583117832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237766437769 + 944947600 = 487613^2 + 30740^2 .

It is a cyclic number.

It is not a de Polignac number, because 238711385369 - 2⁸ = 238711385113 is a prime.

It is a super-2 number, since 2×238711385369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238711385399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119355692684 + 119355692685.

It is an arithmetic number, because the mean of its divisors is an integer number (119355692685).

Almost surely, 2^238711385369 is an apocalyptic number.

It is an amenable number.

238711385369 is a deficient number, since it is larger than the sum of its proper divisors (1).

238711385369 is an equidigital number, since it uses as much as digits as its factorization.

238711385369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The spelling of 238711385369 in words is "two hundred thirty-eight billion, seven hundred eleven million, three hundred eighty-five thousand, three hundred sixty-nine".