1244430091 has 2 divisors, whose sum is σ = 1244430092. Its totient is φ = 1244430090.

The previous prime is 1244430071. The next prime is 1244430133. The reversal of 1244430091 is 1900344421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1244430091 - 2⁹ = 1244429579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244430071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622215045 + 622215046.

It is an arithmetic number, because the mean of its divisors is an integer number (622215046).

Almost surely, 2^1244430091 is an apocalyptic number.

1244430091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244430091 is an equidigital number, since it uses as much as digits as its factorization.

1244430091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1244430091 is about 35276.4807059888. The cubic root of 1244430091 is about 1075.6149619305.

The spelling of 1244430091 in words is "one billion, two hundred forty-four million, four hundred thirty thousand, ninety-one".