1378587601 has 2 divisors, whose sum is σ = 1378587602. Its totient is φ = 1378587600.

The previous prime is 1378587589. The next prime is 1378587671. The reversal of 1378587601 is 1067858731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1290246400 + 88341201 = 35920^2 + 9399^2 .

It is an emirp because it is prime and its reverse (1067858731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378587601 - 2²¹ = 1376490449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378587671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689293800 + 689293801.

It is an arithmetic number, because the mean of its divisors is an integer number (689293801).

Almost surely, 2^1378587601 is an apocalyptic number.

It is an amenable number.

1378587601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378587601 is an equidigital number, since it uses as much as digits as its factorization.

1378587601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 1378587601 is about 37129.3361238792. The cubic root of 1378587601 is about 1112.9563269750.

The spelling of 1378587601 in words is "one billion, three hundred seventy-eight million, five hundred eighty-seven thousand, six hundred one".