11137978 has 8 divisors (see below), whose sum is σ = 17114580. Its totient is φ = 5433120.

The previous prime is 11137969. The next prime is 11137979. The reversal of 11137978 is 87973111.

It can be written as a sum of positive squares in 2 ways, for example, as 9690769 + 1447209 = 3113^2 + 1203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11137979) 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, 67833 + ... + 67996.

Almost surely, 2^11137978 is an apocalyptic number.

11137978 is a deficient number, since it is larger than the sum of its proper divisors (5976602).

11137978 is a wasteful number, since it uses less digits than its factorization.

11137978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135872.

The product of its digits is 10584, while the sum is 37.

The square root of 11137978 is about 3337.3609334323. The cubic root of 11137978 is about 223.3240277304.

The spelling of 11137978 in words is "eleven million, one hundred thirty-seven thousand, nine hundred seventy-eight".