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13190497 = 13796281
BaseRepresentation
bin110010010100…
…010101100001
3220211010221221
4302110111201
511334043442
61150415041
7220055155
oct62242541
926733857
1013190497
11749a241
124501481
13296ab38
141a75065
151258467
hexc94561

13190497 has 4 divisors (see below), whose sum is σ = 13286916. Its totient is φ = 13094080.

The previous prime is 13190467. The next prime is 13190509. The reversal of 13190497 is 79409131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79409131 = 397200023.

It can be written as a sum of positive squares in 2 ways, for example, as 6885376 + 6305121 = 2624^2 + 2511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13190497 is a prime.

It is a super-2 number, since 2×131904972 = 347978422214018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13190467) 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, 48004 + ... + 48277.

It is an arithmetic number, because the mean of its divisors is an integer number (3321729).

Almost surely, 213190497 is an apocalyptic number.

It is an amenable number.

13190497 is a deficient number, since it is larger than the sum of its proper divisors (96419).

13190497 is an equidigital number, since it uses as much as digits as its factorization.

13190497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96418.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 13190497 is about 3631.8723821192. The cubic root of 13190497 is about 236.2764224901.

The spelling of 13190497 in words is "thirteen million, one hundred ninety thousand, four hundred ninety-seven".

Divisors: 1 137 96281 13190497