13720799497 has 4 divisors (see below), whose sum is σ = 13849031376. Its totient is φ = 13592567620.

The previous prime is 13720799489. The next prime is 13720799507. The reversal of 13720799497 is 79499702731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79499702731 = 2663 ⋅29853437.

It is a cyclic number.

It is not a de Polignac number, because 13720799497 - 2³ = 13720799489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13720799447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64115779 + ... + 64115992.

It is an arithmetic number, because the mean of its divisors is an integer number (3462257844).

Almost surely, 2^13720799497 is an apocalyptic number.

It is an amenable number.

13720799497 is a deficient number, since it is larger than the sum of its proper divisors (128231879).

13720799497 is a wasteful number, since it uses less digits than its factorization.

13720799497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128231878.

The product of its (nonzero) digits is 6001128, while the sum is 58.

The spelling of 13720799497 in words is "thirteen billion, seven hundred twenty million, seven hundred ninety-nine thousand, four hundred ninety-seven".