13130981 has 8 divisors (see below), whose sum is σ = 13410240. Its totient is φ = 12853728.

The previous prime is 13130977. The next prime is 13130989. The reversal of 13130981 is 18903131.

13130981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13130981 - 2² = 13130977 is a prime.

It is a super-2 number, since 2×13130981² = 344845324044722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13130981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13130989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26720 + ... + 27206.

It is an arithmetic number, because the mean of its divisors is an integer number (1676280).

Almost surely, 2^13130981 is an apocalyptic number.

It is an amenable number.

13130981 is a deficient number, since it is larger than the sum of its proper divisors (279259).

13130981 is an equidigital number, since it uses as much as digits as its factorization.

13130981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 13130981 is about 3623.6695489517. The cubic root of 13130981 is about 235.9205240860.

The spelling of 13130981 in words is "thirteen million, one hundred thirty thousand, nine hundred eighty-one".