122078423389 has 4 divisors (see below), whose sum is σ = 131469071356. Its totient is φ = 112687775424.

The previous prime is 122078423353. The next prime is 122078423567. The reversal of 122078423389 is 983324870221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28468125625 + 93610297764 = 168725^2 + 305958^2 .

It is a cyclic number.

It is not a de Polignac number, because 122078423389 - 2¹⁹ = 122077899101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122078423329) 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, 4695323964 + ... + 4695323989.

It is an arithmetic number, because the mean of its divisors is an integer number (32867267839).

Almost surely, 2^122078423389 is an apocalyptic number.

It is an amenable number.

122078423389 is a deficient number, since it is larger than the sum of its proper divisors (9390647967).

122078423389 is an equidigital number, since it uses as much as digits as its factorization.

122078423389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9390647966.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 122078423389 in words is "one hundred twenty-two billion, seventy-eight million, four hundred twenty-three thousand, three hundred eighty-nine".