239952091 has 2 divisors, whose sum is σ = 239952092. Its totient is φ = 239952090.

The previous prime is 239952079. The next prime is 239952109. The reversal of 239952091 is 190259932.

Together with next prime (239952109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239952091 is a prime.

It is not a weakly prime, because it can be changed into another prime (239952001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119976045 + 119976046.

It is an arithmetic number, because the mean of its divisors is an integer number (119976046).

Almost surely, 2^239952091 is an apocalyptic number.

239952091 is a deficient number, since it is larger than the sum of its proper divisors (1).

239952091 is an equidigital number, since it uses as much as digits as its factorization.

239952091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 239952091 is about 15490.3870513296. The cubic root of 239952091 is about 621.4051472161.

The spelling of 239952091 in words is "two hundred thirty-nine million, nine hundred fifty-two thousand, ninety-one".