17940679 has 2 divisors, whose sum is σ = 17940680. Its totient is φ = 17940678.

The previous prime is 17940677. The next prime is 17940691. The reversal of 17940679 is 97604971.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17940679 - 2¹ = 17940677 is a prime.

Together with 17940677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17940673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8970339 + 8970340.

It is an arithmetic number, because the mean of its divisors is an integer number (8970340).

Almost surely, 2^17940679 is an apocalyptic number.

17940679 is a deficient number, since it is larger than the sum of its proper divisors (1).

17940679 is an equidigital number, since it uses as much as digits as its factorization.

17940679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 17940679 is about 4235.6438707710. The cubic root of 17940679 is about 261.7859244252.

The spelling of 17940679 in words is "seventeen million, nine hundred forty thousand, six hundred seventy-nine".