12377978 has 8 divisors (see below), whose sum is σ = 18590772. Its totient is φ = 6181056.

The previous prime is 12377971. The next prime is 12377993. The reversal of 12377978 is 87977321.

It can be written as a sum of positive squares in 2 ways, for example, as 8779369 + 3598609 = 2963^2 + 1897^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12377971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1775 + ... + 5282.

Almost surely, 2^12377978 is an apocalyptic number.

12377978 is a deficient number, since it is larger than the sum of its proper divisors (6212794).

12377978 is an equidigital number, since it uses as much as digits as its factorization.

12377978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7936.

The product of its digits is 148176, while the sum is 44.

The square root of 12377978 is about 3518.2350688946. The cubic root of 12377978 is about 231.3218030742.

The spelling of 12377978 in words is "twelve million, three hundred seventy-seven thousand, nine hundred seventy-eight".