340542239 has 4 divisors (see below), whose sum is σ = 340616520. Its totient is φ = 340467960.

The previous prime is 340542217. The next prime is 340542247. The reversal of 340542239 is 932245043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932245043 = 2111 ⋅441613.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340542239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340542259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29777 + ... + 39594.

It is an arithmetic number, because the mean of its divisors is an integer number (85154130).

Almost surely, 2^340542239 is an apocalyptic number.

340542239 is a deficient number, since it is larger than the sum of its proper divisors (74281).

340542239 is an equidigital number, since it uses as much as digits as its factorization.

340542239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74280.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 340542239 is about 18453.7865762016. The cubic root of 340542239 is about 698.3240443333.

The spelling of 340542239 in words is "three hundred forty million, five hundred forty-two thousand, two hundred thirty-nine".