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7643131 is a prime number
BaseRepresentation
bin11101001001111111111011
3112101022101221
4131021333323
53424040011
6431452511
7121652116
oct35117773
915338357
107643131
114350441
122687137
131777b82
14102d57d
15a0e971
hex749ffb

7643131 has 2 divisors, whose sum is σ = 7643132. Its totient is φ = 7643130.

The previous prime is 7643123. The next prime is 7643137. The reversal of 7643131 is 1313467.

Adding to 7643131 its reverse (1313467), we get a palindrome (8956598).

It is a strong prime.

It is an emirp because it is prime and its reverse (1313467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7643131 - 23 = 7643123 is a prime.

It is a super-2 number, since 2×76431312 = 116834902966322, which contains 22 as substring.

7643131 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7643096 and 7643105.

It is not a weakly prime, because it can be changed into another prime (7643137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821565 + 3821566.

It is an arithmetic number, because the mean of its divisors is an integer number (3821566).

Almost surely, 27643131 is an apocalyptic number.

7643131 is the 1749-th centered pentagonal number.

7643131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643131 is an equidigital number, since it uses as much as digits as its factorization.

7643131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 7643131 is about 2764.6213122234. The cubic root of 7643131 is about 196.9807414157.

The spelling of 7643131 in words is "seven million, six hundred forty-three thousand, one hundred thirty-one".