13961377999 has 2 divisors, whose sum is σ = 13961378000. Its totient is φ = 13961377998.

The previous prime is 13961377979. The next prime is 13961378029. The reversal of 13961377999 is 99977316931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13961377999 - 2²⁷ = 13827160271 is a prime.

It is a super-2 number, since 2×13961377999² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13961377999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13961377979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6980688999 + 6980689000.

It is an arithmetic number, because the mean of its divisors is an integer number (6980689000).

Almost surely, 2^13961377999 is an apocalyptic number.

13961377999 is a deficient number, since it is larger than the sum of its proper divisors (1).

13961377999 is an equidigital number, since it uses as much as digits as its factorization.

13961377999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17360406, while the sum is 64.

The spelling of 13961377999 in words is "thirteen billion, nine hundred sixty-one million, three hundred seventy-seven thousand, nine hundred ninety-nine".