239109993 has 6 divisors (see below), whose sum is σ = 345381114. Its totient is φ = 159406656.

The previous prime is 239109979. The next prime is 239110019. The reversal of 239109993 is 399901932.

It can be written as a sum of positive squares in only one way, i.e., 234457344 + 4652649 = 15312^2 + 2157^2 .

It is not a de Polignac number, because 239109993 - 2¹⁷ = 238978921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (239109943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13283880 + ... + 13283897.

It is an arithmetic number, because the mean of its divisors is an integer number (57563519).

Almost surely, 2^239109993 is an apocalyptic number.

It is an amenable number.

239109993 is a deficient number, since it is larger than the sum of its proper divisors (106271121).

239109993 is a wasteful number, since it uses less digits than its factorization.

239109993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26567783 (or 26567780 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 45.

The square root of 239109993 is about 15463.1818523873. The cubic root of 239109993 is about 620.6773666957.

The spelling of 239109993 in words is "two hundred thirty-nine million, one hundred nine thousand, nine hundred ninety-three".