226639913 has 2 divisors, whose sum is σ = 226639914. Its totient is φ = 226639912.

The previous prime is 226639891. The next prime is 226639943. The reversal of 226639913 is 319936622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148547344 + 78092569 = 12188^2 + 8837^2 .

It is a cyclic number.

It is not a de Polignac number, because 226639913 - 2¹⁰ = 226638889 is a prime.

It is not a weakly prime, because it can be changed into another prime (226639943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113319956 + 113319957.

It is an arithmetic number, because the mean of its divisors is an integer number (113319957).

Almost surely, 2^226639913 is an apocalyptic number.

It is an amenable number.

226639913 is a deficient number, since it is larger than the sum of its proper divisors (1).

226639913 is an equidigital number, since it uses as much as digits as its factorization.

226639913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 226639913 is about 15054.5645237582. The cubic root of 226639913 is about 609.6942954451.

The spelling of 226639913 in words is "two hundred twenty-six million, six hundred thirty-nine thousand, nine hundred thirteen".