122780977 has 4 divisors (see below), whose sum is σ = 133942896. Its totient is φ = 111619060.

The previous prime is 122780971. The next prime is 122780989. The reversal of 122780977 is 779087221.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 122780977 - 2¹⁵ = 122748209 is a prime.

It is a super-3 number, since 3×122780977³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122780971) 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, 5580943 + ... + 5580964.

It is an arithmetic number, because the mean of its divisors is an integer number (33485724).

Almost surely, 2^122780977 is an apocalyptic number.

It is an amenable number.

122780977 is a deficient number, since it is larger than the sum of its proper divisors (11161919).

122780977 is a wasteful number, since it uses less digits than its factorization.

122780977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11161918.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 122780977 is about 11080.6577873337. The cubic root of 122780977 is about 497.0236201490.

The spelling of 122780977 in words is "one hundred twenty-two million, seven hundred eighty thousand, nine hundred seventy-seven".