940209539 has 2 divisors, whose sum is σ = 940209540. Its totient is φ = 940209538.

The previous prime is 940209511. The next prime is 940209587. The reversal of 940209539 is 935902049.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940209539 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 940209496 and 940209505.

It is not a weakly prime, because it can be changed into another prime (940209239) 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 as a sum of consecutive naturals, namely, 470104769 + 470104770.

It is an arithmetic number, because the mean of its divisors is an integer number (470104770).

Almost surely, 2^940209539 is an apocalyptic number.

940209539 is a deficient number, since it is larger than the sum of its proper divisors (1).

940209539 is an equidigital number, since it uses as much as digits as its factorization.

940209539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 940209539 is about 30662.8364474000. The cubic root of 940209539 is about 979.6588910715.

The spelling of 940209539 in words is "nine hundred forty million, two hundred nine thousand, five hundred thirty-nine".