1244041091 has 2 divisors, whose sum is σ = 1244041092. Its totient is φ = 1244041090.

The previous prime is 1244041087. The next prime is 1244041103. The reversal of 1244041091 is 1901404421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1244041091 - 2² = 1244041087 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1244041091.

It is not a weakly prime, because it can be changed into another prime (1244041031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622020545 + 622020546.

It is an arithmetic number, because the mean of its divisors is an integer number (622020546).

Almost surely, 2^1244041091 is an apocalyptic number.

1244041091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244041091 is an equidigital number, since it uses as much as digits as its factorization.

1244041091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1244041091 is about 35270.9666864973. The cubic root of 1244041091 is about 1075.5028737201.

The spelling of 1244041091 in words is "one billion, two hundred forty-four million, forty-one thousand, ninety-one".