123798643 has 2 divisors, whose sum is σ = 123798644. Its totient is φ = 123798642.

The previous prime is 123798617. The next prime is 123798667. The reversal of 123798643 is 346897321.

It is a strong prime.

It is an emirp because it is prime and its reverse (346897321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123798643 - 2¹³ = 123790451 is a prime.

It is a super-2 number, since 2×123798643² = 30652208017282898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123798643.

It is not a weakly prime, because it can be changed into another prime (123798943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61899321 + 61899322.

It is an arithmetic number, because the mean of its divisors is an integer number (61899322).

Almost surely, 2^123798643 is an apocalyptic number.

123798643 is a deficient number, since it is larger than the sum of its proper divisors (1).

123798643 is an equidigital number, since it uses as much as digits as its factorization.

123798643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 123798643 is about 11126.4838560976. The cubic root of 123798643 is about 498.3930315042.

The spelling of 123798643 in words is "one hundred twenty-three million, seven hundred ninety-eight thousand, six hundred forty-three".