13782479 has 4 divisors (see below), whose sum is σ = 13797000. Its totient is φ = 13767960.

The previous prime is 13782409. The next prime is 13782481. The reversal of 13782479 is 97428731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97428731 = 1193 ⋅81667.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13782479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13782409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5729 + ... + 7770.

It is an arithmetic number, because the mean of its divisors is an integer number (3449250).

Almost surely, 2^13782479 is an apocalyptic number.

13782479 is a deficient number, since it is larger than the sum of its proper divisors (14521).

13782479 is a wasteful number, since it uses less digits than its factorization.

13782479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14520.

The product of its digits is 84672, while the sum is 41.

The square root of 13782479 is about 3712.4761278694. The cubic root of 13782479 is about 239.7594754655.

The spelling of 13782479 in words is "thirteen million, seven hundred eighty-two thousand, four hundred seventy-nine".