1305538013893 has 4 divisors (see below), whose sum is σ = 1374250540960. Its totient is φ = 1236825486828.

The previous prime is 1305538013861. The next prime is 1305538013929. The reversal of 1305538013893 is 3983108355031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1305538013893 - 2⁵ = 1305538013861 is a prime.

It is a super-2 number, since 2×1305538013893² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305538013693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34356263505 + ... + 34356263542.

It is an arithmetic number, because the mean of its divisors is an integer number (343562635240).

Almost surely, 2^{1305538013893} is an apocalyptic number.

It is an amenable number.

1305538013893 is a deficient number, since it is larger than the sum of its proper divisors (68712527067).

1305538013893 is an equidigital number, since it uses as much as digits as its factorization.

1305538013893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68712527066.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 1305538013893 in words is "one trillion, three hundred five billion, five hundred thirty-eight million, thirteen thousand, eight hundred ninety-three".