1141978811 has 2 divisors, whose sum is σ = 1141978812. Its totient is φ = 1141978810.

The previous prime is 1141978751. The next prime is 1141978867. The reversal of 1141978811 is 1188791411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1141978811 - 2¹⁴ = 1141962427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1141978511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570989405 + 570989406.

It is an arithmetic number, because the mean of its divisors is an integer number (570989406).

Almost surely, 2^1141978811 is an apocalyptic number.

1141978811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1141978811 is an equidigital number, since it uses as much as digits as its factorization.

1141978811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 41.

The square root of 1141978811 is about 33793.1769888538. The cubic root of 1141978811 is about 1045.2480081064.

The spelling of 1141978811 in words is "one billion, one hundred forty-one million, nine hundred seventy-eight thousand, eight hundred eleven".