122780347 has 4 divisors (see below), whose sum is σ = 123996096. Its totient is φ = 121564600.

The previous prime is 122780311. The next prime is 122780353. The reversal of 122780347 is 743087221.

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 122780347 - 2⁷ = 122780219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122780377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607723 + ... + 607924.

It is an arithmetic number, because the mean of its divisors is an integer number (30999024).

Almost surely, 2^122780347 is an apocalyptic number.

122780347 is a deficient number, since it is larger than the sum of its proper divisors (1215749).

122780347 is a wasteful number, since it uses less digits than its factorization.

122780347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215748.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 122780347 is about 11080.6293593821. The cubic root of 122780347 is about 497.0227700569.

The spelling of 122780347 in words is "one hundred twenty-two million, seven hundred eighty thousand, three hundred forty-seven".