13157447 has 4 divisors (see below), whose sum is σ = 13337760. Its totient is φ = 12977136.

The previous prime is 13157437. The next prime is 13157453. The reversal of 13157447 is 74475131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13157447 - 2⁶ = 13157383 is a prime.

It is a super-3 number, since 3×13157447³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157437) 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, 90047 + ... + 90192.

It is an arithmetic number, because the mean of its divisors is an integer number (3334440).

Almost surely, 2^13157447 is an apocalyptic number.

13157447 is a deficient number, since it is larger than the sum of its proper divisors (180313).

13157447 is an equidigital number, since it uses as much as digits as its factorization.

13157447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180312.

The product of its digits is 11760, while the sum is 32.

The square root of 13157447 is about 3627.3195337604. The cubic root of 13157447 is about 236.0789200291.

The spelling of 13157447 in words is "thirteen million, one hundred fifty-seven thousand, four hundred forty-seven".