1143564791 has 2 divisors, whose sum is σ = 1143564792. Its totient is φ = 1143564790.

The previous prime is 1143564781. The next prime is 1143564817. The reversal of 1143564791 is 1974653411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1143564791 - 2²² = 1139370487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143564781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571782395 + 571782396.

It is an arithmetic number, because the mean of its divisors is an integer number (571782396).

Almost surely, 2^1143564791 is an apocalyptic number.

1143564791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143564791 is an equidigital number, since it uses as much as digits as its factorization.

1143564791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 1143564791 is about 33816.6348266648. The cubic root of 1143564791 is about 1045.7316643667.

The spelling of 1143564791 in words is "one billion, one hundred forty-three million, five hundred sixty-four thousand, seven hundred ninety-one".