1378925635 has 4 divisors (see below), whose sum is σ = 1654710768. Its totient is φ = 1103140504.

The previous prime is 1378925633. The next prime is 1378925651. The reversal of 1378925635 is 5365298731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5365298731 = 13 ⋅412715287.

It is a cyclic number.

It is not a de Polignac number, because 1378925635 - 2¹ = 1378925633 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378925633) 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 in 3 ways as a sum of consecutive naturals, for example, 137892559 + ... + 137892568.

It is an arithmetic number, because the mean of its divisors is an integer number (413677692).

Almost surely, 2^1378925635 is an apocalyptic number.

1378925635 is a deficient number, since it is larger than the sum of its proper divisors (275785133).

1378925635 is an equidigital number, since it uses as much as digits as its factorization.

1378925635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275785132.

The product of its digits is 1360800, while the sum is 49.

The square root of 1378925635 is about 37133.8879596522. The cubic root of 1378925635 is about 1113.0472863340.

The spelling of 1378925635 in words is "one billion, three hundred seventy-eight million, nine hundred twenty-five thousand, six hundred thirty-five".