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.

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, 2^7643131 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.

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

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