1378073563 has 2 divisors, whose sum is σ = 1378073564. Its totient is φ = 1378073562.

The previous prime is 1378073537. The next prime is 1378073579. The reversal of 1378073563 is 3653708731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378073563 - 2¹³ = 1378065371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378073513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689036781 + 689036782.

It is an arithmetic number, because the mean of its divisors is an integer number (689036782).

Almost surely, 2^1378073563 is an apocalyptic number.

1378073563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378073563 is an equidigital number, since it uses as much as digits as its factorization.

1378073563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 1378073563 is about 37122.4132162768. The cubic root of 1378073563 is about 1112.8179793488.

The spelling of 1378073563 in words is "one billion, three hundred seventy-eight million, seventy-three thousand, five hundred sixty-three".