1040140399 has 2 divisors, whose sum is σ = 1040140400. Its totient is φ = 1040140398.

The previous prime is 1040140391. The next prime is 1040140429. The reversal of 1040140399 is 9930410401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1040140399 - 2³ = 1040140391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1040140399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040140391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520070199 + 520070200.

It is an arithmetic number, because the mean of its divisors is an integer number (520070200).

Almost surely, 2^1040140399 is an apocalyptic number.

1040140399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040140399 is an equidigital number, since it uses as much as digits as its factorization.

1040140399 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 31.

The square root of 1040140399 is about 32251.2077138206. The cubic root of 1040140399 is about 1013.2049936172.

The spelling of 1040140399 in words is "one billion, forty million, one hundred forty thousand, three hundred ninety-nine".