1378694503 has 2 divisors, whose sum is σ = 1378694504. Its totient is φ = 1378694502.

The previous prime is 1378694479. The next prime is 1378694507. The reversal of 1378694503 is 3054968731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378694503 - 2²¹ = 1376597351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378694507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689347251 + 689347252.

It is an arithmetic number, because the mean of its divisors is an integer number (689347252).

Almost surely, 2^1378694503 is an apocalyptic number.

1378694503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378694503 is an equidigital number, since it uses as much as digits as its factorization.

1378694503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 1378694503 is about 37130.7756854068. The cubic root of 1378694503 is about 1112.9850941427.

The spelling of 1378694503 in words is "one billion, three hundred seventy-eight million, six hundred ninety-four thousand, five hundred three".