17940959 has 4 divisors (see below), whose sum is σ = 18885240. Its totient is φ = 16996680.

The previous prime is 17940953. The next prime is 17940973. The reversal of 17940959 is 95904971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95904971 = 229 ⋅418799.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17940959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17940953) 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, 472112 + ... + 472149.

It is an arithmetic number, because the mean of its divisors is an integer number (4721310).

Almost surely, 2^17940959 is an apocalyptic number.

17940959 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

17940959 is a deficient number, since it is larger than the sum of its proper divisors (944281).

17940959 is an equidigital number, since it uses as much as digits as its factorization.

17940959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944280.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 17940959 is about 4235.6769234681. The cubic root of 17940959 is about 261.7872863149.

The spelling of 17940959 in words is "seventeen million, nine hundred forty thousand, nine hundred fifty-nine".