1093943978 has 8 divisors (see below), whose sum is σ = 1642819968. Its totient is φ = 546337324.

The previous prime is 1093943971. The next prime is 1093943987. The reversal of 1093943978 is 8793493901.

It is a happy number.

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 (1093943971) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 315176 + ... + 318627.

It is an arithmetic number, because the mean of its divisors is an integer number (205352496).

Almost surely, 2^1093943978 is an apocalyptic number.

1093943978 is a deficient number, since it is larger than the sum of its proper divisors (548875990).

1093943978 is an equidigital number, since it uses as much as digits as its factorization.

1093943978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634668.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 1093943978 is about 33074.8239299924. The cubic root of 1093943978 is about 1030.3822309654.

The spelling of 1093943978 in words is "one billion, ninety-three million, nine hundred forty-three thousand, nine hundred seventy-eight".