238860421091 has 2 divisors, whose sum is σ = 238860421092. Its totient is φ = 238860421090.

The previous prime is 238860421087. The next prime is 238860421157. The reversal of 238860421091 is 190124068832.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238860421091 - 2² = 238860421087 is a prime.

It is not a weakly prime, because it can be changed into another prime (238860421021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119430210545 + 119430210546.

It is an arithmetic number, because the mean of its divisors is an integer number (119430210546).

Almost surely, 2^238860421091 is an apocalyptic number.

238860421091 is a deficient number, since it is larger than the sum of its proper divisors (1).

238860421091 is an equidigital number, since it uses as much as digits as its factorization.

238860421091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 238860421091 in words is "two hundred thirty-eight billion, eight hundred sixty million, four hundred twenty-one thousand, ninety-one".