13530931 has 2 divisors, whose sum is σ = 13530932. Its totient is φ = 13530930.

The previous prime is 13530919. The next prime is 13530941. The reversal of 13530931 is 13903531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13530931 - 2²³ = 5142323 is a prime.

It is a super-2 number, since 2×13530931² = 366172187453522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13530896 and 13530905.

It is not a weakly prime, because it can be changed into another prime (13530941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765465 + 6765466.

It is an arithmetic number, because the mean of its divisors is an integer number (6765466).

Almost surely, 2^13530931 is an apocalyptic number.

13530931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13530931 is an equidigital number, since it uses as much as digits as its factorization.

13530931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215, while the sum is 25.

The square root of 13530931 is about 3678.4413818899. The cubic root of 13530931 is about 238.2918705753.

The spelling of 13530931 in words is "thirteen million, five hundred thirty thousand, nine hundred thirty-one".