13011649 has 4 divisors (see below), whose sum is σ = 14870464. Its totient is φ = 11152836.

The previous prime is 13011641. The next prime is 13011697. The reversal of 13011649 is 94611031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94611031 = 5351 ⋅17681.

It is a cyclic number.

It is not a de Polignac number, because 13011649 - 2³ = 13011641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13011641) 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, 929397 + ... + 929410.

It is an arithmetic number, because the mean of its divisors is an integer number (3717616).

Almost surely, 2^13011649 is an apocalyptic number.

It is an amenable number.

13011649 is a deficient number, since it is larger than the sum of its proper divisors (1858815).

13011649 is an equidigital number, since it uses as much as digits as its factorization.

13011649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858814.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 13011649 is about 3607.1663393861. The cubic root of 13011649 is about 235.2036803630.

The spelling of 13011649 in words is "thirteen million, eleven thousand, six hundred forty-nine".