122908915847 has 4 divisors (see below), whose sum is σ = 126873719616. Its totient is φ = 118944112080.

The previous prime is 122908915823. The next prime is 122908915889. The reversal of 122908915847 is 748519809221.

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 122908915847 - 2⁶ = 122908915783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122908915792 and 122908915801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122908965847) 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, 1982401838 + ... + 1982401899.

It is an arithmetic number, because the mean of its divisors is an integer number (31718429904).

Almost surely, 2^122908915847 is an apocalyptic number.

122908915847 is a deficient number, since it is larger than the sum of its proper divisors (3964803769).

122908915847 is an equidigital number, since it uses as much as digits as its factorization.

122908915847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964803768.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 122908915847 in words is "one hundred twenty-two billion, nine hundred eight million, nine hundred fifteen thousand, eight hundred forty-seven".