13977747 has 24 divisors (see below), whose sum is σ = 23269376. Its totient is φ = 7919856.

The previous prime is 13977737. The next prime is 13977751. The reversal of 13977747 is 74777931.

It is not a de Polignac number, because 13977747 - 2⁷ = 13977619 is a prime.

It is a super-2 number, since 2×13977747² = 390754822392018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13977727) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 7128 + ... + 8874.

Almost surely, 2^13977747 is an apocalyptic number.

13977747 is a deficient number, since it is larger than the sum of its proper divisors (9291629).

13977747 is a wasteful number, since it uses less digits than its factorization.

13977747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1884 counting only the distinct ones).

The product of its digits is 259308, while the sum is 45.

The square root of 13977747 is about 3738.6825219588. The cubic root of 13977747 is about 240.8864613284.

The spelling of 13977747 in words is "thirteen million, nine hundred seventy-seven thousand, seven hundred forty-seven".