13023661 has 12 divisors (see below), whose sum is σ = 15379968. Its totient is φ = 10993752.

The previous prime is 13023641. The next prime is 13023677. The reversal of 13023661 is 16632031.

13023661 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 13023661 - 2¹³ = 13015469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1300 + ... + 5266.

It is an arithmetic number, because the mean of its divisors is an integer number (1281664).

Almost surely, 2^13023661 is an apocalyptic number.

It is an amenable number.

13023661 is a deficient number, since it is larger than the sum of its proper divisors (2356307).

13023661 is an equidigital number, since it uses as much as digits as its factorization.

13023661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048 (or 4041 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 13023661 is about 3608.8309741522. The cubic root of 13023661 is about 235.2760359794.

Adding to 13023661 its reverse (16632031), we get a palindrome (29655692).

The spelling of 13023661 in words is "thirteen million, twenty-three thousand, six hundred sixty-one".