13902779 has 12 divisors (see below), whose sum is σ = 15465240. Its totient is φ = 12487200.

The previous prime is 13902773. The next prime is 13902797. The reversal of 13902779 is 97720931.

It is not a de Polignac number, because 13902779 - 2⁸ = 13902523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13902773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10124 + ... + 11414.

It is an arithmetic number, because the mean of its divisors is an integer number (1288770).

Almost surely, 2^13902779 is an apocalyptic number.

13902779 is a deficient number, since it is larger than the sum of its proper divisors (1562461).

13902779 is a wasteful number, since it uses less digits than its factorization.

13902779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402 (or 1391 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 13902779 is about 3728.6430507626. The cubic root of 13902779 is about 240.4550337135.

It can be divided in two parts, 1390 and 2779, that multiplied together give a triangular number (3862810 = T₂₇₇₉).

The spelling of 13902779 in words is "thirteen million, nine hundred two thousand, seven hundred seventy-nine".