1141978687 has 2 divisors, whose sum is σ = 1141978688. Its totient is φ = 1141978686.

The previous prime is 1141978601. The next prime is 1141978751. The reversal of 1141978687 is 7868791411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1141978687 - 2¹¹ = 1141976639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1141978087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570989343 + 570989344.

It is an arithmetic number, because the mean of its divisors is an integer number (570989344).

Almost surely, 2^1141978687 is an apocalyptic number.

1141978687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1141978687 is an equidigital number, since it uses as much as digits as its factorization.

1141978687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 52.

The square root of 1141978687 is about 33793.1751541639. The cubic root of 1141978687 is about 1045.2479702742.

The spelling of 1141978687 in words is "one billion, one hundred forty-one million, nine hundred seventy-eight thousand, six hundred eighty-seven".