13555779 has 8 divisors (see below), whose sum is σ = 18118992. Its totient is φ = 9014880.

The previous prime is 13555777. The next prime is 13555799. The reversal of 13555779 is 97755531.

13555779 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13555779 - 2¹ = 13555777 is a prime.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 13555779.

It is not an unprimeable number, because it can be changed into a prime (13555771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4104 + ... + 6629.

It is an arithmetic number, because the mean of its divisors is an integer number (2264874).

Almost surely, 2^13555779 is an apocalyptic number.

13555779 is a deficient number, since it is larger than the sum of its proper divisors (4563213).

13555779 is a wasteful number, since it uses less digits than its factorization.

13555779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11157.

The product of its digits is 165375, while the sum is 42.

The square root of 13555779 is about 3681.8173501683. The cubic root of 13555779 is about 238.4376465911.

The spelling of 13555779 in words is "thirteen million, five hundred fifty-five thousand, seven hundred seventy-nine".