13655407 has 4 divisors (see below), whose sum is σ = 14095936. Its totient is φ = 13214880.

The previous prime is 13655401. The next prime is 13655417. The reversal of 13655407 is 70455631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70455631 = 479 ⋅147089.

It is a cyclic number.

It is not a de Polignac number, because 13655407 - 2²³ = 5266799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 440497 = 13655407 / (1 + 3 + 6 + 5 + 5 + 4 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13655401) 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, 220218 + ... + 220279.

It is an arithmetic number, because the mean of its divisors is an integer number (3523984).

Almost surely, 2^13655407 is an apocalyptic number.

13655407 is a deficient number, since it is larger than the sum of its proper divisors (440529).

13655407 is an equidigital number, since it uses as much as digits as its factorization.

13655407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440528.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 13655407 is about 3695.3223134119. The cubic root of 13655407 is about 239.0203527190.

The spelling of 13655407 in words is "thirteen million, six hundred fifty-five thousand, four hundred seven".