7138643 has 2 divisors, whose sum is σ = 7138644. Its totient is φ = 7138642.

The previous prime is 7138639. The next prime is 7138673. The reversal of 7138643 is 3468317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7138643 - 2² = 7138639 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (7138603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569321 + 3569322.

It is an arithmetic number, because the mean of its divisors is an integer number (3569322).

Almost surely, 2^7138643 is an apocalyptic number.

7138643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138643 is an equidigital number, since it uses as much as digits as its factorization.

7138643 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 7138643 is about 2671.8239088682. The cubic root of 7138643 is about 192.5477972051.

It can be divided in two parts, 71 and 38643, that multiplied together give a triangular number (2743653 = T₂₃₄₂).

The spelling of 7138643 in words is "seven million, one hundred thirty-eight thousand, six hundred forty-three".