122378393 has 8 divisors (see below), whose sum is σ = 129950568. Its totient is φ = 114847744.

The previous prime is 122378353. The next prime is 122378407. The reversal of 122378393 is 393873221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29506624 + 92871769 = 5432^2 + 9637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122378393 - 2⁶ = 122378329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122378303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4196 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (16243821).

Almost surely, 2^122378393 is an apocalyptic number.

It is an amenable number.

122378393 is a deficient number, since it is larger than the sum of its proper divisors (7572175).

122378393 is a wasteful number, since it uses less digits than its factorization.

122378393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20763.

The product of its digits is 54432, while the sum is 38.

The square root of 122378393 is about 11062.4768022356. The cubic root of 122378393 is about 496.4797985254.

The spelling of 122378393 in words is "one hundred twenty-two million, three hundred seventy-eight thousand, three hundred ninety-three".