13720413 has 32 divisors (see below), whose sum is σ = 22256640. Its totient is φ = 7344000.

The previous prime is 13720409. The next prime is 13720417. The reversal of 13720413 is 31402731.

It is an interprime number because it is at equal distance from previous prime (13720409) and next prime (13720417).

It is not a de Polignac number, because 13720413 - 2² = 13720409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13720413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54538 + ... + 54788.

It is an arithmetic number, because the mean of its divisors is an integer number (695520).

Almost surely, 2^13720413 is an apocalyptic number.

It is an amenable number.

13720413 is a deficient number, since it is larger than the sum of its proper divisors (8536227).

13720413 is a wasteful number, since it uses less digits than its factorization.

13720413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 13720413 is about 3704.1075848307. The cubic root of 13720413 is about 239.3990346197.

The spelling of 13720413 in words is "thirteen million, seven hundred twenty thousand, four hundred thirteen".