1375623563 has 2 divisors, whose sum is σ = 1375623564. Its totient is φ = 1375623562.

The previous prime is 1375623559. The next prime is 1375623569. The reversal of 1375623563 is 3653265731.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3653265731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1375623563 - 2² = 1375623559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1375623563.

It is not a weakly prime, because it can be changed into another prime (1375623569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687811781 + 687811782.

It is an arithmetic number, because the mean of its divisors is an integer number (687811782).

Almost surely, 2^1375623563 is an apocalyptic number.

1375623563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375623563 is an equidigital number, since it uses as much as digits as its factorization.

1375623563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 41.

The square root of 1375623563 is about 37089.3996041996. The cubic root of 1375623563 is about 1112.1581158438.

The spelling of 1375623563 in words is "one billion, three hundred seventy-five million, six hundred twenty-three thousand, five hundred sixty-three".