13690779 has 16 divisors (see below), whose sum is σ = 18808320. Its totient is φ = 8854560.

The previous prime is 13690769. The next prime is 13690793. The reversal of 13690779 is 97709631.

It is not a de Polignac number, because 13690779 - 2¹³ = 13682587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13690779.

It is not an unprimeable number, because it can be changed into a prime (13690739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13984 + ... + 14930.

It is an arithmetic number, because the mean of its divisors is an integer number (1175520).

Almost surely, 2^13690779 is an apocalyptic number.

13690779 is a deficient number, since it is larger than the sum of its proper divisors (5117541).

13690779 is an equidigital number, since it uses as much as digits as its factorization.

13690779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 71442, while the sum is 42.

The square root of 13690779 is about 3700.1052687728. The cubic root of 13690779 is about 239.2265552465.

The spelling of 13690779 in words is "thirteen million, six hundred ninety thousand, seven hundred seventy-nine".