13720177 has 4 divisors (see below), whose sum is σ = 13791460. Its totient is φ = 13648896.

The previous prime is 13720169. The next prime is 13720211. The reversal of 13720177 is 77102731.

13720177 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77102731 = 167 ⋅461693.

It can be written as a sum of positive squares in 2 ways, for example, as 1018081 + 12702096 = 1009^2 + 3564^2 .

It is a cyclic number.

It is not a de Polignac number, because 13720177 - 2³ = 13720169 is a prime.

It is a super-2 number, since 2×13720177² = 376486513822658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13720127) 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, 35352 + ... + 35737.

It is an arithmetic number, because the mean of its divisors is an integer number (3447865).

Almost surely, 2^13720177 is an apocalyptic number.

It is an amenable number.

13720177 is a deficient number, since it is larger than the sum of its proper divisors (71283).

13720177 is an equidigital number, since it uses as much as digits as its factorization.

13720177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71282.

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 13720177 is about 3704.0757281676. The cubic root of 13720177 is about 239.3976620056.

The spelling of 13720177 in words is "thirteen million, seven hundred twenty thousand, one hundred seventy-seven".