12513789 has 6 divisors (see below), whose sum is σ = 18075486. Its totient is φ = 8342520.

The previous prime is 12513769. The next prime is 12513793. The reversal of 12513789 is 98731521.

It can be written as a sum of positive squares in only one way, i.e., 7518564 + 4995225 = 2742^2 + 2235^2 .

It is not a de Polignac number, because 12513789 - 2²³ = 4125181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12513749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 695202 + ... + 695219.

It is an arithmetic number, because the mean of its divisors is an integer number (3012581).

Almost surely, 2^12513789 is an apocalyptic number.

It is an amenable number.

12513789 is a deficient number, since it is larger than the sum of its proper divisors (5561697).

12513789 is a wasteful number, since it uses less digits than its factorization.

12513789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390427 (or 1390424 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12513789 is about 3537.4834275230. The cubic root of 12513789 is about 232.1647474787.

The spelling of 12513789 in words is "twelve million, five hundred thirteen thousand, seven hundred eighty-nine".