13772005 has 8 divisors (see below), whose sum is σ = 17797752. Its totient is φ = 10170048.

The previous prime is 13771999. The next prime is 13772039. The reversal of 13772005 is 50027731.

It can be written as a sum of positive squares in 4 ways, for example, as 484 + 13771521 = 22^2 + 3711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13772005 - 2⁵ = 13771973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105874 + ... + 106003.

It is an arithmetic number, because the mean of its divisors is an integer number (2224719).

Almost surely, 2^13772005 is an apocalyptic number.

It is an amenable number.

13772005 is a deficient number, since it is larger than the sum of its proper divisors (4025747).

13772005 is a wasteful number, since it uses less digits than its factorization.

13772005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211895.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 13772005 is about 3711.0652109603. The cubic root of 13772005 is about 239.6987249732.

Adding to 13772005 its reverse (50027731), we get a palindrome (63799736).

The spelling of 13772005 in words is "thirteen million, seven hundred seventy-two thousand, five".