11878709 has 2 divisors, whose sum is σ = 11878710. Its totient is φ = 11878708.

The previous prime is 11878697. The next prime is 11878729. The reversal of 11878709 is 90787811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8868484 + 3010225 = 2978^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 11878709 - 2⁴ = 11878693 is a prime.

It is a super-2 number, since 2×11878709² = 282207455013362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11878729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5939354 + 5939355.

It is an arithmetic number, because the mean of its divisors is an integer number (5939355).

Almost surely, 2^11878709 is an apocalyptic number.

It is an amenable number.

11878709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11878709 is an equidigital number, since it uses as much as digits as its factorization.

11878709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 41.

The square root of 11878709 is about 3446.5503042898. The cubic root of 11878709 is about 228.1688820068.

The spelling of 11878709 in words is "eleven million, eight hundred seventy-eight thousand, seven hundred nine".