1093978042 has 4 divisors (see below), whose sum is σ = 1640967066. Its totient is φ = 546989020.
The previous prime is 1093978027. The next prime is 1093978051. The reversal of 1093978042 is 2408793901.
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., 617472801 + 476505241 = 24849^2 + 21829^2 .
It is a self number, because there is not a number n which added to its sum of digits gives 1093978042.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273494509 + ... + 273494512.
Almost surely, 21093978042 is an apocalyptic number.
1093978042 is a deficient number, since it is larger than the sum of its proper divisors (546989024).
1093978042 is an equidigital number, since it uses as much as digits as its factorization.
1093978042 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 546989023.
The product of its (nonzero) digits is 108864, while the sum is 43.
The square root of 1093978042 is about 33075.3388795943. The cubic root of 1093978042 is about 1030.3929257775.
The spelling of 1093978042 in words is "one billion, ninety-three million, nine hundred seventy-eight thousand, forty-two".
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