1144431091 has 2 divisors, whose sum is σ = 1144431092. Its totient is φ = 1144431090.

The previous prime is 1144431077. The next prime is 1144431121. The reversal of 1144431091 is 1901344411.

It is a weak prime.

It is an emirp because it is prime and its reverse (1901344411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1144431091 - 2¹⁵ = 1144398323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1144431191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572215545 + 572215546.

It is an arithmetic number, because the mean of its divisors is an integer number (572215546).

Almost surely, 2^1144431091 is an apocalyptic number.

1144431091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144431091 is an equidigital number, since it uses as much as digits as its factorization.

1144431091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1144431091 is about 33829.4411866351. The cubic root of 1144431091 is about 1045.9956601009.

The spelling of 1144431091 in words is "one billion, one hundred forty-four million, four hundred thirty-one thousand, ninety-one".