13785039449 has 2 divisors, whose sum is σ = 13785039450. Its totient is φ = 13785039448.

The previous prime is 13785039427. The next prime is 13785039469. The reversal of 13785039449 is 94493058731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12883839049 + 901200400 = 113507^2 + 30020^2 .

It is a cyclic number.

It is not a de Polignac number, because 13785039449 - 2¹⁶ = 13784973913 is a prime.

It is a super-4 number, since 4×13785039449⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 13785039449.

It is not a weakly prime, because it can be changed into another prime (13785039409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6892519724 + 6892519725.

It is an arithmetic number, because the mean of its divisors is an integer number (6892519725).

Almost surely, 2^13785039449 is an apocalyptic number.

It is an amenable number.

13785039449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13785039449 is an equidigital number, since it uses as much as digits as its factorization.

13785039449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 13785039449 in words is "thirteen billion, seven hundred eighty-five million, thirty-nine thousand, four hundred forty-nine".