13919992061 has 2 divisors, whose sum is σ = 13919992062. Its totient is φ = 13919992060.

The previous prime is 13919992057. The next prime is 13919992067. The reversal of 13919992061 is 16029991931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8806884025 + 5113108036 = 93845^2 + 71506^2 .

It is a cyclic number.

It is not a de Polignac number, because 13919992061 - 2² = 13919992057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13919992067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6959996030 + 6959996031.

It is an arithmetic number, because the mean of its divisors is an integer number (6959996031).

Almost surely, 2^13919992061 is an apocalyptic number.

It is an amenable number.

13919992061 is a deficient number, since it is larger than the sum of its proper divisors (1).

13919992061 is an equidigital number, since it uses as much as digits as its factorization.

13919992061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 50.

The spelling of 13919992061 in words is "thirteen billion, nine hundred nineteen million, nine hundred ninety-two thousand, sixty-one".