13953035981 has 2 divisors, whose sum is σ = 13953035982. Its totient is φ = 13953035980.

The previous prime is 13953035953. The next prime is 13953036049. The reversal of 13953035981 is 18953035931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8856503881 + 5096532100 = 94109^2 + 71390^2 .

It is a cyclic number.

It is not a de Polignac number, because 13953035981 - 2¹⁰ = 13953034957 is a prime.

It is a super-2 number, since 2×13953035981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13953035881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6976517990 + 6976517991.

It is an arithmetic number, because the mean of its divisors is an integer number (6976517991).

Almost surely, 2^13953035981 is an apocalyptic number.

It is an amenable number.

13953035981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13953035981 is an equidigital number, since it uses as much as digits as its factorization.

13953035981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 47.

The spelling of 13953035981 in words is "thirteen billion, nine hundred fifty-three million, thirty-five thousand, nine hundred eighty-one".