13131623 has 2 divisors, whose sum is σ = 13131624. Its totient is φ = 13131622.

The previous prime is 13131607. The next prime is 13131649. The reversal of 13131623 is 32613131.

It is a happy number.

13131623 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13131623 - 2⁴ = 13131607 is a prime.

It is a super-2 number, since 2×13131623² = 344879045228258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13131595 and 13131604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13131023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565811 + 6565812.

It is an arithmetic number, because the mean of its divisors is an integer number (6565812).

Almost surely, 2^13131623 is an apocalyptic number.

13131623 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131623 is an equidigital number, since it uses as much as digits as its factorization.

13131623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 20.

The square root of 13131623 is about 3623.7581321054. The cubic root of 13131623 is about 235.9243688992.

Adding to 13131623 its reverse (32613131), we get a palindrome (45744754).

The spelling of 13131623 in words is "thirteen million, one hundred thirty-one thousand, six hundred twenty-three".