239332991 has 2 divisors, whose sum is σ = 239332992. Its totient is φ = 239332990.

The previous prime is 239332981. The next prime is 239332997. The reversal of 239332991 is 199233932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239332991 - 2¹⁴ = 239316607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239332997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119666495 + 119666496.

It is an arithmetic number, because the mean of its divisors is an integer number (119666496).

Almost surely, 2^239332991 is an apocalyptic number.

239332991 is a deficient number, since it is larger than the sum of its proper divisors (1).

239332991 is an equidigital number, since it uses as much as digits as its factorization.

239332991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 41.

The square root of 239332991 is about 15470.3907836874. The cubic root of 239332991 is about 620.8702581264.

The spelling of 239332991 in words is "two hundred thirty-nine million, three hundred thirty-two thousand, nine hundred ninety-one".