1378895879 has 2 divisors, whose sum is σ = 1378895880. Its totient is φ = 1378895878.

The previous prime is 1378895867. The next prime is 1378895897. The reversal of 1378895879 is 9785988731.

It is a happy number.

Together with next prime (1378895897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (9785988731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378895879 - 2¹² = 1378891783 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378895809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689447939 + 689447940.

It is an arithmetic number, because the mean of its divisors is an integer number (689447940).

Almost surely, 2^1378895879 is an apocalyptic number.

1378895879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378895879 is an equidigital number, since it uses as much as digits as its factorization.

1378895879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 65.

The square root of 1378895879 is about 37133.4872992021. The cubic root of 1378895879 is about 1113.0392800832.

The spelling of 1378895879 in words is "one billion, three hundred seventy-eight million, eight hundred ninety-five thousand, eight hundred seventy-nine".