122781977 has 8 divisors (see below), whose sum is σ = 124095840. Its totient is φ = 121474080.

The previous prime is 122781937. The next prime is 122781991. The reversal of 122781977 is 779187221.

It is a happy number.

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 122781977 - 2²² = 118587673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122781937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48413 + ... + 50885.

It is an arithmetic number, because the mean of its divisors is an integer number (15511980).

Almost surely, 2^122781977 is an apocalyptic number.

It is an amenable number.

122781977 is a deficient number, since it is larger than the sum of its proper divisors (1313863).

122781977 is a wasteful number, since it uses less digits than its factorization.

122781977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983.

The product of its digits is 98784, while the sum is 44.

The square root of 122781977 is about 11080.7029109168. The cubic root of 122781977 is about 497.0249694956.

The spelling of 122781977 in words is "one hundred twenty-two million, seven hundred eighty-one thousand, nine hundred seventy-seven".