4999409 has 2 divisors, whose sum is σ = 4999410. Its totient is φ = 4999408.

The previous prime is 4999391. The next prime is 4999427. The reversal of 4999409 is 9049994.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (4999391) and next prime (4999427).

It can be written as a sum of positive squares in only one way, i.e., 4752400 + 247009 = 2180^2 + 497^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4999409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4999409.

It is not a weakly prime, because it can be changed into another prime (4999439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499704 + 2499705.

It is an arithmetic number, because the mean of its divisors is an integer number (2499705).

Almost surely, 2^4999409 is an apocalyptic number.

It is an amenable number.

4999409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999409 is an equidigital number, since it uses as much as digits as its factorization.

4999409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 4999409 is about 2235.9358219770. The cubic root of 4999409 is about 170.9908570970.

The spelling of 4999409 in words is "four million, nine hundred ninety-nine thousand, four hundred nine".