13779550 has 12 divisors (see below), whose sum is σ = 25630056. Its totient is φ = 5511800.

The previous prime is 13779539. The next prime is 13779587. The reversal of 13779550 is 5597731.

It is a happy 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 5 ways as a sum of consecutive naturals, for example, 137746 + ... + 137845.

It is an arithmetic number, because the mean of its divisors is an integer number (2135838).

Almost surely, 2^13779550 is an apocalyptic number.

13779550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13779550 is a deficient number, since it is larger than the sum of its proper divisors (11850506).

13779550 is a wasteful number, since it uses less digits than its factorization.

13779550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275603 (or 275598 counting only the distinct ones).

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 13779550 is about 3712.0816262577. The cubic root of 13779550 is about 239.7424900050.

The spelling of 13779550 in words is "thirteen million, seven hundred seventy-nine thousand, five hundred fifty".