13409623 has 4 divisors (see below), whose sum is σ = 13433760. Its totient is φ = 13385488.

The previous prime is 13409603. The next prime is 13409633. The reversal of 13409623 is 32690431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32690431 = 19 ⋅1720549.

It is a cyclic number.

It is not a de Polignac number, because 13409623 - 2⁹ = 13409111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13409591 and 13409600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13409603) 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, 11215 + ... + 12352.

It is an arithmetic number, because the mean of its divisors is an integer number (3358440).

Almost surely, 2^13409623 is an apocalyptic number.

13409623 is a deficient number, since it is larger than the sum of its proper divisors (24137).

13409623 is an equidigital number, since it uses as much as digits as its factorization.

13409623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24136.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 13409623 is about 3661.9152092860. The cubic root of 13409623 is about 237.5776174750.

The spelling of 13409623 in words is "thirteen million, four hundred nine thousand, six hundred twenty-three".