1378587671 has 2 divisors, whose sum is σ = 1378587672. Its totient is φ = 1378587670.

The previous prime is 1378587601. The next prime is 1378587673. The reversal of 1378587671 is 1767858731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378587671 - 2¹⁸ = 1378325527 is a prime.

Together with 1378587673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378587673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689293835 + 689293836.

It is an arithmetic number, because the mean of its divisors is an integer number (689293836).

Almost surely, 2^1378587671 is an apocalyptic number.

1378587671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378587671 is an equidigital number, since it uses as much as digits as its factorization.

1378587671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1975680, while the sum is 53.

The square root of 1378587671 is about 37129.3370665300. The cubic root of 1378587671 is about 1112.9563458124.

The spelling of 1378587671 in words is "one billion, three hundred seventy-eight million, five hundred eighty-seven thousand, six hundred seventy-one".