11707978 has 4 divisors (see below), whose sum is σ = 17561970. Its totient is φ = 5853988.

The previous prime is 11707939. The next prime is 11707981. The reversal of 11707978 is 87970711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6385729 + 5322249 = 2527^2 + 2307^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11707978.

It is an unprimeable number.

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, 2926993 + ... + 2926996.

Almost surely, 2^11707978 is an apocalyptic number.

11707978 is a deficient number, since it is larger than the sum of its proper divisors (5853992).

11707978 is an equidigital number, since it uses as much as digits as its factorization.

11707978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853991.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 11707978 is about 3421.6922713768. The cubic root of 11707978 is about 227.0704562422.

The spelling of 11707978 in words is "eleven million, seven hundred seven thousand, nine hundred seventy-eight".