1141978694 has 4 divisors (see below), whose sum is σ = 1712968044. Its totient is φ = 570989346.

The previous prime is 1141978687. The next prime is 1141978751. The reversal of 1141978694 is 4968791411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4968791411 = 6863 ⋅723997.

It is a congruent number.

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, 285494672 + ... + 285494675.

It is an arithmetic number, because the mean of its divisors is an integer number (428242011).

Almost surely, 2^1141978694 is an apocalyptic number.

1141978694 is a deficient number, since it is larger than the sum of its proper divisors (570989350).

1141978694 is an equidigital number, since it uses as much as digits as its factorization.

1141978694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570989349.

The product of its digits is 435456, while the sum is 50.

The square root of 1141978694 is about 33793.1752577351. The cubic root of 1141978694 is about 1045.2479724099.

The spelling of 1141978694 in words is "one billion, one hundred forty-one million, nine hundred seventy-eight thousand, six hundred ninety-four".