123354567899 has 4 divisors (see below), whose sum is σ = 123359645136. Its totient is φ = 123349490664.

The previous prime is 123354567859. The next prime is 123354567907. The reversal of 123354567899 is 998765453321.

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 123354567899 - 2¹² = 123354563803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123354567839) 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, 2501999 + ... + 2550824.

It is an arithmetic number, because the mean of its divisors is an integer number (30839911284).

Almost surely, 2^123354567899 is an apocalyptic number.

123354567899 is a deficient number, since it is larger than the sum of its proper divisors (5077237).

123354567899 is an equidigital number, since it uses as much as digits as its factorization.

123354567899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077236.

The product of its digits is 48988800, while the sum is 62.

The spelling of 123354567899 in words is "one hundred twenty-three billion, three hundred fifty-four million, five hundred sixty-seven thousand, eight hundred ninety-nine".