1378997527 has 2 divisors, whose sum is σ = 1378997528. Its totient is φ = 1378997526.

The previous prime is 1378997519. The next prime is 1378997539. The reversal of 1378997527 is 7257998731.

It is a weak prime.

It is an emirp because it is prime and its reverse (7257998731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378997527 - 2³ = 1378997519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378994527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689498763 + 689498764.

It is an arithmetic number, because the mean of its divisors is an integer number (689498764).

Almost surely, 2^1378997527 is an apocalyptic number.

1378997527 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378997527 is an equidigital number, since it uses as much as digits as its factorization.

1378997527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6667920, while the sum is 58.

The square root of 1378997527 is about 37134.8559577118. The cubic root of 1378997527 is about 1113.0666293652.

The spelling of 1378997527 in words is "one billion, three hundred seventy-eight million, nine hundred ninety-seven thousand, five hundred twenty-seven".