1026431687 has 2 divisors, whose sum is σ = 1026431688. Its totient is φ = 1026431686.

The previous prime is 1026431683. The next prime is 1026431719. The reversal of 1026431687 is 7861346201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1026431687 - 2² = 1026431683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1026431687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1026431683) 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, 513215843 + 513215844.

It is an arithmetic number, because the mean of its divisors is an integer number (513215844).

Almost surely, 2^1026431687 is an apocalyptic number.

1026431687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026431687 is an equidigital number, since it uses as much as digits as its factorization.

1026431687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1026431687 is about 32037.9725794252. The cubic root of 1026431687 is about 1008.7340565015.

Adding to 1026431687 its reverse (7861346201), we get a palindrome (8887777888).

The spelling of 1026431687 in words is "one billion, twenty-six million, four hundred thirty-one thousand, six hundred eighty-seven".