1143377591 has 2 divisors, whose sum is σ = 1143377592. Its totient is φ = 1143377590.

The previous prime is 1143377581. The next prime is 1143377597. The reversal of 1143377591 is 1957733411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1143377591 - 2¹⁸ = 1143115447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143377597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571688795 + 571688796.

It is an arithmetic number, because the mean of its divisors is an integer number (571688796).

Almost surely, 2^1143377591 is an apocalyptic number.

1143377591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143377591 is an equidigital number, since it uses as much as digits as its factorization.

1143377591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 41.

The square root of 1143377591 is about 33813.8668448316. The cubic root of 1143377591 is about 1045.6745996360.

The spelling of 1143377591 in words is "one billion, one hundred forty-three million, three hundred seventy-seven thousand, five hundred ninety-one".