11678729 has 4 divisors (see below), whose sum is σ = 11787984. Its totient is φ = 11569476.

The previous prime is 11678707. The next prime is 11678743. The reversal of 11678729 is 92787611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92787611 = 7 ⋅13255373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11678729 is a prime.

It is a super-2 number, since 2×11678729² = 272785422110882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11678129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54467 + ... + 54680.

It is an arithmetic number, because the mean of its divisors is an integer number (2946996).

Almost surely, 2^11678729 is an apocalyptic number.

It is an amenable number.

11678729 is a deficient number, since it is larger than the sum of its proper divisors (109255).

11678729 is a wasteful number, since it uses less digits than its factorization.

11678729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109254.

The product of its digits is 42336, while the sum is 41.

The square root of 11678729 is about 3417.4155439455. The cubic root of 11678729 is about 226.8812085868.

The spelling of 11678729 in words is "eleven million, six hundred seventy-eight thousand, seven hundred twenty-nine".