13007785 has 12 divisors (see below), whose sum is σ = 18158148. Its totient is φ = 8919456.

The previous prime is 13007777. The next prime is 13007791. The reversal of 13007785 is 58770031.

It can be written as a sum of positive squares in 2 ways, for example, as 7376656 + 5631129 = 2716^2 + 2373^2 .

It is not a de Polignac number, because 13007785 - 2³ = 13007777 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26302 + ... + 26791.

It is an arithmetic number, because the mean of its divisors is an integer number (1513179).

Almost surely, 2^13007785 is an apocalyptic number.

It is an amenable number.

13007785 is a deficient number, since it is larger than the sum of its proper divisors (5150363).

13007785 is an equidigital number, since it uses as much as digits as its factorization.

13007785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53112 (or 53105 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 13007785 is about 3606.6306991429. The cubic root of 13007785 is about 235.1803956638.

The spelling of 13007785 in words is "thirteen million, seven thousand, seven hundred eighty-five".