1363125509 has 2 divisors, whose sum is σ = 1363125510. Its totient is φ = 1363125508.

The previous prime is 1363125503. The next prime is 1363125539. The reversal of 1363125509 is 9055213631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1061130625 + 301994884 = 32575^2 + 17378^2 .

It is an emirp because it is prime and its reverse (9055213631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1363125509 is a prime.

It is a super-2 number, since 2×1363125509² = 3716222306573018162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1363125503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681562754 + 681562755.

It is an arithmetic number, because the mean of its divisors is an integer number (681562755).

Almost surely, 2^1363125509 is an apocalyptic number.

It is an amenable number.

1363125509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363125509 is an equidigital number, since it uses as much as digits as its factorization.

1363125509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 1363125509 is about 36920.5296413797. The cubic root of 1363125509 is about 1108.7797398292.

The spelling of 1363125509 in words is "one billion, three hundred sixty-three million, one hundred twenty-five thousand, five hundred nine".