1040391487 has 2 divisors, whose sum is σ = 1040391488. Its totient is φ = 1040391486.

The previous prime is 1040391481. The next prime is 1040391533. The reversal of 1040391487 is 7841930401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1040391487 - 2³ = 1040391479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040391481) 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, 520195743 + 520195744.

It is an arithmetic number, because the mean of its divisors is an integer number (520195744).

Almost surely, 2^1040391487 is an apocalyptic number.

1040391487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040391487 is an equidigital number, since it uses as much as digits as its factorization.

1040391487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1040391487 is about 32255.1001703607. The cubic root of 1040391487 is about 1013.2865156718.

The spelling of 1040391487 in words is "one billion, forty million, three hundred ninety-one thousand, four hundred eighty-seven".