13940984381 has 2 divisors, whose sum is σ = 13940984382. Its totient is φ = 13940984380.

The previous prime is 13940984339. The next prime is 13940984413. The reversal of 13940984381 is 18348904931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7895921881 + 6045062500 = 88859^2 + 77750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13940984381 is a prime.

It is a super-2 number, since 2×13940984381² (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 (13940984881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6970492190 + 6970492191.

It is an arithmetic number, because the mean of its divisors is an integer number (6970492191).

Almost surely, 2^13940984381 is an apocalyptic number.

It is an amenable number.

13940984381 is a deficient number, since it is larger than the sum of its proper divisors (1).

13940984381 is an equidigital number, since it uses as much as digits as its factorization.

13940984381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 13940984381 in words is "thirteen billion, nine hundred forty million, nine hundred eighty-four thousand, three hundred eighty-one".