13391953 has 4 divisors (see below), whose sum is σ = 13718628. Its totient is φ = 13065280.

The previous prime is 13391933. The next prime is 13391977. The reversal of 13391953 is 35919331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35919331 = 7 ⋅5131333.

It can be written as a sum of positive squares in 2 ways, for example, as 5166529 + 8225424 = 2273^2 + 2868^2 .

It is a cyclic number.

It is not a de Polignac number, because 13391953 - 2¹⁷ = 13260881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13391933) 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, 163276 + ... + 163357.

It is an arithmetic number, because the mean of its divisors is an integer number (3429657).

Almost surely, 2^13391953 is an apocalyptic number.

It is an amenable number.

13391953 is a deficient number, since it is larger than the sum of its proper divisors (326675).

13391953 is an equidigital number, since it uses as much as digits as its factorization.

13391953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326674.

The product of its digits is 10935, while the sum is 34.

The square root of 13391953 is about 3659.5017420408. The cubic root of 13391953 is about 237.4732187715.

The spelling of 13391953 in words is "thirteen million, three hundred ninety-one thousand, nine hundred fifty-three".