1378694479 has 2 divisors, whose sum is σ = 1378694480. Its totient is φ = 1378694478.

The previous prime is 1378694417. The next prime is 1378694503. The reversal of 1378694479 is 9744968731.

It is a strong prime.

It is an emirp because it is prime and its reverse (9744968731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378694479 - 2¹¹ = 1378692431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378694179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689347239 + 689347240.

It is an arithmetic number, because the mean of its divisors is an integer number (689347240).

Almost surely, 2^1378694479 is an apocalyptic number.

1378694479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378694479 is an equidigital number, since it uses as much as digits as its factorization.

1378694479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 58.

The square root of 1378694479 is about 37130.7753622248. The cubic root of 1378694479 is about 1112.9850876845.

The spelling of 1378694479 in words is "one billion, three hundred seventy-eight million, six hundred ninety-four thousand, four hundred seventy-nine".