13623506 has 16 divisors (see below), whose sum is σ = 22206744. Its totient is φ = 6230784.

The previous prime is 13623503. The next prime is 13623509. The reversal of 13623506 is 60532631.

It is an interprime number because it is at equal distance from previous prime (13623503) and next prime (13623509).

It can be written as a sum of positive squares in 4 ways, for example, as 3441025 + 10182481 = 1855^2 + 3191^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (13623503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620 + ... + 5256.

Almost surely, 2^13623506 is an apocalyptic number.

13623506 is a deficient number, since it is larger than the sum of its proper divisors (8583238).

13623506 is a wasteful number, since it uses less digits than its factorization.

13623506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 13623506 is about 3691.0033866145. The cubic root of 13623506 is about 238.8340789184.

The spelling of 13623506 in words is "thirteen million, six hundred twenty-three thousand, five hundred six".