4009913 has 2 divisors, whose sum is σ = 4009914. Its totient is φ = 4009912.

The previous prime is 4009897. The next prime is 4009919. The reversal of 4009913 is 3199004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3988009 + 21904 = 1997^2 + 148^2 .

It is a cyclic number.

It is not a de Polignac number, because 4009913 - 2⁴ = 4009897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4009919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2004956 + 2004957.

It is an arithmetic number, because the mean of its divisors is an integer number (2004957).

Almost surely, 2^4009913 is an apocalyptic number.

It is an amenable number.

4009913 is a deficient number, since it is larger than the sum of its proper divisors (1).

4009913 is an equidigital number, since it uses as much as digits as its factorization.

4009913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 4009913 is about 2002.4767164689. The cubic root of 4009913 is about 158.8711295745.

The spelling of 4009913 in words is "four million, nine thousand, nine hundred thirteen".