13780034 has 4 divisors (see below), whose sum is σ = 20670054. Its totient is φ = 6890016.

The previous prime is 13780033. The next prime is 13780037. The reversal of 13780034 is 43008731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43008731 = 1777 ⋅24203.

It can be written as a sum of positive squares in only one way, i.e., 13667809 + 112225 = 3697^2 + 335^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13779985 and 13780012.

It is not an unprimeable number, because it can be changed into a prime (13780033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3445007 + ... + 3445010.

Almost surely, 2^13780034 is an apocalyptic number.

13780034 is a deficient number, since it is larger than the sum of its proper divisors (6890020).

13780034 is an equidigital number, since it uses as much as digits as its factorization.

13780034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6890019.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 13780034 is about 3712.1468182172. The cubic root of 13780034 is about 239.7452969183.

Adding to 13780034 its reverse (43008731), we get a palindrome (56788765).

The spelling of 13780034 in words is "thirteen million, seven hundred eighty thousand, thirty-four".