1011404399 has 2 divisors, whose sum is σ = 1011404400. Its totient is φ = 1011404398.

The previous prime is 1011404389. The next prime is 1011404417. The reversal of 1011404399 is 9934041101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011404399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011404389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505702199 + 505702200.

It is an arithmetic number, because the mean of its divisors is an integer number (505702200).

Almost surely, 2^1011404399 is an apocalyptic number.

1011404399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011404399 is an equidigital number, since it uses as much as digits as its factorization.

1011404399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1011404399 is about 31802.5847848882. The cubic root of 1011404399 is about 1003.7871060559.

The spelling of 1011404399 in words is "one billion, eleven million, four hundred four thousand, three hundred ninety-nine".