7638143 has 2 divisors, whose sum is σ = 7638144. Its totient is φ = 7638142.

The previous prime is 7638089. The next prime is 7638149. The reversal of 7638143 is 3418367.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7638143 - 2¹⁴ = 7621759 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is equal to p₅₁₆₉₈₃ and since 7638143 and 516983 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7638149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819071 + 3819072.

It is an arithmetic number, because the mean of its divisors is an integer number (3819072).

Almost surely, 2^7638143 is an apocalyptic number.

7638143 is a deficient number, since it is larger than the sum of its proper divisors (1).

7638143 is an equidigital number, since it uses as much as digits as its factorization.

7638143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 7638143 is about 2763.7190522917. The cubic root of 7638143 is about 196.9378814170.

The spelling of 7638143 in words is "seven million, six hundred thirty-eight thousand, one hundred forty-three".