13977745 has 12 divisors (see below), whose sum is σ = 17337780. Its totient is φ = 10817760.

The previous prime is 13977737. The next prime is 13977751. The reversal of 13977745 is 54777931.

It can be written as a sum of positive squares in 2 ways, for example, as 8856576 + 5121169 = 2976^2 + 2263^2 .

It is not a de Polignac number, because 13977745 - 2³ = 13977737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3351 + ... + 6259.

It is an arithmetic number, because the mean of its divisors is an integer number (1444815).

Almost surely, 2^13977745 is an apocalyptic number.

It is an amenable number.

13977745 is a deficient number, since it is larger than the sum of its proper divisors (3360035).

13977745 is an equidigital number, since it uses as much as digits as its factorization.

13977745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976 (or 2945 counting only the distinct ones).

The product of its digits is 185220, while the sum is 43.

The square root of 13977745 is about 3738.6822544849. The cubic root of 13977745 is about 240.8864498394.

The spelling of 13977745 in words is "thirteen million, nine hundred seventy-seven thousand, seven hundred forty-five".