238933091 has 2 divisors, whose sum is σ = 238933092. Its totient is φ = 238933090.

The previous prime is 238933081. The next prime is 238933103. The reversal of 238933091 is 190339832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238933091 - 2¹⁸ = 238670947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (238933021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119466545 + 119466546.

It is an arithmetic number, because the mean of its divisors is an integer number (119466546).

Almost surely, 2^238933091 is an apocalyptic number.

238933091 is a deficient number, since it is larger than the sum of its proper divisors (1).

238933091 is an equidigital number, since it uses as much as digits as its factorization.

238933091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 238933091 is about 15457.4606905533. The cubic root of 238933091 is about 620.5242626019.

The spelling of 238933091 in words is "two hundred thirty-eight million, nine hundred thirty-three thousand, ninety-one".