1143313091 has 2 divisors, whose sum is σ = 1143313092. Its totient is φ = 1143313090.

The previous prime is 1143313069. The next prime is 1143313123. The reversal of 1143313091 is 1903133411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1143313091 - 2²² = 1139118787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143313091.

It is not a weakly prime, because it can be changed into another prime (1143313001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571656545 + 571656546.

It is an arithmetic number, because the mean of its divisors is an integer number (571656546).

Almost surely, 2^1143313091 is an apocalyptic number.

1143313091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143313091 is an equidigital number, since it uses as much as digits as its factorization.

1143313091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1143313091 is about 33812.9130806560. The cubic root of 1143313091 is about 1045.6549364671.

The spelling of 1143313091 in words is "one billion, one hundred forty-three million, three hundred thirteen thousand, ninety-one".