1378910587 has 2 divisors, whose sum is σ = 1378910588. Its totient is φ = 1378910586.

The previous prime is 1378910563. The next prime is 1378910591. The reversal of 1378910587 is 7850198731.

It is a strong prime.

It is an emirp because it is prime and its reverse (7850198731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378910587 - 2⁷ = 1378910459 is a prime.

It is a super-3 number, since 3×1378910587³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1378910587.

It is not a weakly prime, because it can be changed into another prime (1378916587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689455293 + 689455294.

It is an arithmetic number, because the mean of its divisors is an integer number (689455294).

Almost surely, 2^1378910587 is an apocalyptic number.

1378910587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378910587 is an equidigital number, since it uses as much as digits as its factorization.

1378910587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 49.

The square root of 1378910587 is about 37133.6853409408. The cubic root of 1378910587 is about 1113.0432374822.

The spelling of 1378910587 in words is "one billion, three hundred seventy-eight million, nine hundred ten thousand, five hundred eighty-seven".