7838307643 has 2 divisors, whose sum is σ = 7838307644. Its totient is φ = 7838307642.

The previous prime is 7838307637. The next prime is 7838307647. The reversal of 7838307643 is 3467038387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7838307643 - 2¹³ = 7838299451 is a prime.

It is a super-2 number, since 2×7838307643² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7838307647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3919153821 + 3919153822.

It is an arithmetic number, because the mean of its divisors is an integer number (3919153822).

Almost surely, 2^7838307643 is an apocalyptic number.

7838307643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7838307643 is an equidigital number, since it uses as much as digits as its factorization.

7838307643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The square root of 7838307643 is about 88534.2173569067. The cubic root of 7838307643 is about 1986.4338244179.

The spelling of 7838307643 in words is "seven billion, eight hundred thirty-eight million, three hundred seven thousand, six hundred forty-three".