13061691 has 24 divisors (see below), whose sum is σ = 19459440. Its totient is φ = 8438976.

The previous prime is 13061681. The next prime is 13061731. The reversal of 13061691 is 19616031.

13061691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13061691 - 2⁹ = 13061179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13061611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66205 + ... + 66401.

It is an arithmetic number, because the mean of its divisors is an integer number (810810).

Almost surely, 2^13061691 is an apocalyptic number.

13061691 is a deficient number, since it is larger than the sum of its proper divisors (6397749).

13061691 is a wasteful number, since it uses less digits than its factorization.

13061691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 13061691 is about 3614.0961525671. The cubic root of 13061691 is about 235.5048209218.

The spelling of 13061691 in words is "thirteen million, sixty-one thousand, six hundred ninety-one".