11878729 has 2 divisors, whose sum is σ = 11878730. Its totient is φ = 11878728.

The previous prime is 11878709. The next prime is 11878747. The reversal of 11878729 is 92787811.

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., 11696400 + 182329 = 3420^2 + 427^2 .

It is a cyclic number.

It is not a de Polignac number, because 11878729 - 2⁵ = 11878697 is a prime.

It is a super-2 number, since 2×11878729² = 282208405310882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11878709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5939364 + 5939365.

It is an arithmetic number, because the mean of its divisors is an integer number (5939365).

Almost surely, 2^11878729 is an apocalyptic number.

It is an amenable number.

11878729 is a deficient number, since it is larger than the sum of its proper divisors (1).

11878729 is an equidigital number, since it uses as much as digits as its factorization.

11878729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 43.

The square root of 11878729 is about 3446.5532057405. The cubic root of 11878729 is about 228.1690100616.

The spelling of 11878729 in words is "eleven million, eight hundred seventy-eight thousand, seven hundred twenty-nine".