1278036479 has 2 divisors, whose sum is σ = 1278036480. Its totient is φ = 1278036478.

The previous prime is 1278036451. The next prime is 1278036481. The reversal of 1278036479 is 9746308721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1278036479 - 2¹² = 1278032383 is a prime.

Together with 1278036481, 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 (1278036439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639018239 + 639018240.

It is an arithmetic number, because the mean of its divisors is an integer number (639018240).

Almost surely, 2^1278036479 is an apocalyptic number.

1278036479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278036479 is an equidigital number, since it uses as much as digits as its factorization.

1278036479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 1278036479 is about 35749.6360680777. The cubic root of 1278036479 is about 1085.2115733430.

The spelling of 1278036479 in words is "one billion, two hundred seventy-eight million, thirty-six thousand, four hundred seventy-nine".