239143961 has 6 divisors (see below), whose sum is σ = 278187930. Its totient is φ = 204980496.

The previous prime is 239143909. The next prime is 239143967. The reversal of 239143961 is 169341932.

It can be written as a sum of positive squares in only one way, i.e., 235438336 + 3705625 = 15344^2 + 1925^2 .

It is not a de Polignac number, because 239143961 - 2¹⁸ = 238881817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239143967) 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, 2440196 + ... + 2440293.

It is an arithmetic number, because the mean of its divisors is an integer number (46364655).

Almost surely, 2^239143961 is an apocalyptic number.

It is an amenable number.

239143961 is a deficient number, since it is larger than the sum of its proper divisors (39043969).

239143961 is an equidigital number, since it uses as much as digits as its factorization.

239143961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880503 (or 4880496 counting only the distinct ones).

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

The square root of 239143961 is about 15464.2801643012. The cubic root of 239143961 is about 620.7067564761.

The spelling of 239143961 in words is "two hundred thirty-nine million, one hundred forty-three thousand, nine hundred sixty-one".