13157747 has 4 divisors (see below), whose sum is σ = 13850280. Its totient is φ = 12465216.

The previous prime is 13157737. The next prime is 13157773. The reversal of 13157747 is 74775131.

13157747 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.

It is not a de Polignac number, because 13157747 - 2⁴ = 13157731 is a prime.

It is a super-2 number, since 2×13157747² = 346252612232018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13157737) 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, 346238 + ... + 346275.

It is an arithmetic number, because the mean of its divisors is an integer number (3462570).

Almost surely, 2^13157747 is an apocalyptic number.

13157747 is a deficient number, since it is larger than the sum of its proper divisors (692533).

13157747 is an equidigital number, since it uses as much as digits as its factorization.

13157747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692532.

The product of its digits is 20580, while the sum is 35.

The square root of 13157747 is about 3627.3608863746. The cubic root of 13157747 is about 236.0807142763.

The spelling of 13157747 in words is "thirteen million, one hundred fifty-seven thousand, seven hundred forty-seven".