122790017 has 4 divisors (see below), whose sum is σ = 140331456. Its totient is φ = 105248580.

The previous prime is 122790001. The next prime is 122790047. The reversal of 122790017 is 710097221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710097221 = 4967 ⋅142963.

It is a cyclic number.

It is not a de Polignac number, because 122790017 - 2⁴ = 122790001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122790047) 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, 8770709 + ... + 8770722.

It is an arithmetic number, because the mean of its divisors is an integer number (35082864).

Almost surely, 2^122790017 is an apocalyptic number.

It is an amenable number.

122790017 is a deficient number, since it is larger than the sum of its proper divisors (17541439).

122790017 is an equidigital number, since it uses as much as digits as its factorization.

122790017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17541438.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 122790017 is about 11081.0656978469. The cubic root of 122790017 is about 497.0358179757.

The spelling of 122790017 in words is "one hundred twenty-two million, seven hundred ninety thousand, seventeen".