11778723 has 16 divisors (see below), whose sum is σ = 19036800. Its totient is φ = 7138440.

The previous prime is 11778719. The next prime is 11778731. The reversal of 11778723 is 32787711.

It is a happy number.

It is not a de Polignac number, because 11778723 - 2² = 11778719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11778733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19533 + ... + 20126.

It is an arithmetic number, because the mean of its divisors is an integer number (1189800).

Almost surely, 2^11778723 is an apocalyptic number.

11778723 is a deficient number, since it is larger than the sum of its proper divisors (7258077).

11778723 is a wasteful number, since it uses less digits than its factorization.

11778723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39679 (or 39673 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The square root of 11778723 is about 3432.0144230466. The cubic root of 11778723 is about 227.5268929284.

The spelling of 11778723 in words is "eleven million, seven hundred seventy-eight thousand, seven hundred twenty-three".