4993909 has 2 divisors, whose sum is σ = 4993910. Its totient is φ = 4993908.

The previous prime is 4993907. The next prime is 4993913. The reversal of 4993909 is 9093994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4223025 + 770884 = 2055^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 4993909 - 2¹ = 4993907 is a prime.

Together with 4993907, 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 (4993907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2496954 + 2496955.

It is an arithmetic number, because the mean of its divisors is an integer number (2496955).

Almost surely, 2^4993909 is an apocalyptic number.

It is an amenable number.

4993909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4993909 is an equidigital number, since it uses as much as digits as its factorization.

4993909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 4993909 is about 2234.7055734481. The cubic root of 4993909 is about 170.9281300295.

It can be divided in two parts, 499 and 3909, that multiplied together give a palindrome (1950591).

The spelling of 4993909 in words is "four million, nine hundred ninety-three thousand, nine hundred nine".