1040040389 has 2 divisors, whose sum is σ = 1040040390. Its totient is φ = 1040040388.

The previous prime is 1040040371. The next prime is 1040040401. The reversal of 1040040389 is 9830400401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1027202500 + 12837889 = 32050^2 + 3583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040040389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040040689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520020194 + 520020195.

It is an arithmetic number, because the mean of its divisors is an integer number (520020195).

Almost surely, 2^1040040389 is an apocalyptic number.

It is an amenable number.

1040040389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040040389 is an equidigital number, since it uses as much as digits as its factorization.

1040040389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1040040389 is about 32249.6571919765. The cubic root of 1040040389 is about 1013.1725191937.

The spelling of 1040040389 in words is "one billion, forty million, forty thousand, three hundred eighty-nine".