123902299643 has 4 divisors (see below), whose sum is σ = 126002338680. Its totient is φ = 121802260608.

The previous prime is 123902299567. The next prime is 123902299649. The reversal of 123902299643 is 346992209321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123902299643 - 2¹² = 123902295547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123902299591 and 123902299600.

It is not an unprimeable number, because it can be changed into a prime (123902299649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050019430 + ... + 1050019547.

It is an arithmetic number, because the mean of its divisors is an integer number (31500584670).

Almost surely, 2^123902299643 is an apocalyptic number.

123902299643 is a deficient number, since it is larger than the sum of its proper divisors (2100039037).

123902299643 is an equidigital number, since it uses as much as digits as its factorization.

123902299643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100039036.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 123902299643 in words is "one hundred twenty-three billion, nine hundred two million, two hundred ninety-nine thousand, six hundred forty-three".