122789047 has 4 divisors (see below), whose sum is σ = 126750016. Its totient is φ = 118828080.

The previous prime is 122789003. The next prime is 122789053. The reversal of 122789047 is 740987221.

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 122789047 - 2¹⁵ = 122756279 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 (122783047) 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, 1980438 + ... + 1980499.

It is an arithmetic number, because the mean of its divisors is an integer number (31687504).

Almost surely, 2^122789047 is an apocalyptic number.

122789047 is a deficient number, since it is larger than the sum of its proper divisors (3960969).

122789047 is an equidigital number, since it uses as much as digits as its factorization.

122789047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960968.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 122789047 is about 11081.0219294071. The cubic root of 122789047 is about 497.0345091668.

The spelling of 122789047 in words is "one hundred twenty-two million, seven hundred eighty-nine thousand, forty-seven".