13478137 has 4 divisors (see below), whose sum is σ = 13706640. Its totient is φ = 13249636.

The previous prime is 13478131. The next prime is 13478141. The reversal of 13478137 is 73187431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73187431 = 17 ⋅4305143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13478137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13478131) 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, 114163 + ... + 114280.

It is an arithmetic number, because the mean of its divisors is an integer number (3426660).

Almost surely, 2^13478137 is an apocalyptic number.

It is an amenable number.

13478137 is a deficient number, since it is larger than the sum of its proper divisors (228503).

13478137 is an equidigital number, since it uses as much as digits as its factorization.

13478137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228502.

The product of its digits is 14112, while the sum is 34.

The square root of 13478137 is about 3671.2582311791. The cubic root of 13478137 is about 237.9815500139.

The spelling of 13478137 in words is "thirteen million, four hundred seventy-eight thousand, one hundred thirty-seven".